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Shift the right half's top two rows: 6 and F6 lead the right hand

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Resolves the ragged outer edge on both halves at once. Left drops to 34 keys
in six columns each five deep, with no orphans. Right goes to 41: six full
columns, then F12/=/]/Enter, then Bksp and backslash sharing the outer pinky
column instead of backslash sitting alone two columns out.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
This commit is contained in:
William Rickert
2026-08-27 15:09:21 -05:00
co-authored by Claude Opus 5
parent 13c5ca5d5d
commit 5e527bb7b9
4 changed files with 114 additions and 118 deletions
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README.md
+17 -19
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@@ -11,8 +11,8 @@ Status: **design**. No boards ordered, no firmware written.
| Board | Qty | Keys | Carries |
|---|---|---|---|
| `hardware/half-left` | 1 | **36** | MCU, matrix, USB-C, SBU split link |
| `hardware/half-right` | 1 | **39** | MCU, matrix, USB-C, SBU split link |
| `hardware/half-left` | 1 | **34** | MCU, matrix, USB-C, SBU split link |
| `hardware/half-right` | 1 | **41** | MCU, matrix, USB-C, SBU split link |
| `hardware/numpad` | 1 | 25 (16 numpad + 9 nav) | MCU, matrix, 1 encoder, **CH334R hub**, 3 downstream ports |
**Numpad layout is settled** — see `docs/numpad-layout.svg`, and
@@ -148,7 +148,7 @@ for footprints — don't draw them.
### The halves are two different boards
Splitting a full 104 at the 6/T/G/B boundary gives **36 keys left, 39 right** —
Splitting a full 104 gives **34 keys left, 41 right** (after moving `6`/`F6` right) —
the right side inherits Backspace, Enter, both brackets, the backslash and an
extra bottom-row key. They are therefore *not* mirrors, and the earlier plan of
one layout flipped for both halves does not survive.
@@ -199,27 +199,25 @@ board is used less.
`docs/half-right-staggered.svg`.
### The ragged outer edge — an open decision
### The outer edge — resolved
Splitting a row-staggered 104 leaves keys that have no column to belong to,
because the number row and the alpha rows are cut half a unit apart.
Splitting a row-staggered 104 leaves keys with no column to belong to: the
number row and the alpha rows are cut half a unit apart, so `6` sits between `T`
and `Y` with no alpha beneath it.
- **Left half:** `6` and `F6` end up alone in a 2-key column. `6` sits at x=6.0,
`T` at x=5.5, `Y` at x=6.5 — so `6` is *between* T and Y, and falls left of
the cut with no alpha beneath it.
- **Right half:** worse. Six clean columns, then an outer pinky column holding
Bksp / `]` / Enter, and **`\` alone in an eighth column**.
**Resolved by shifting the right half's top two rows over one column**, so `6`
leads the number row and `F6` leads the function row, both sitting above `Y`.
Three ways to resolve it, undecided:
- **Left: 34 keys, six columns, every one five deep.** No orphans at all.
- **Right: 41 keys.** Six full columns, then `F12`/`=`/`]`/`Enter`, then `Bksp`
and `\` sharing the outer pinky column.
1. **Keep it.** Authentic to touch-typing — `6` really is a left-index stretch.
2. **Move `6`/`F6` right**, aligned above `Y`. Left becomes a clean 6 columns at
34 keys, right goes to 41.
3. **Duplicate `6` on both halves.** What the ErgoDox does. Costs one key, ends
the argument.
`\` no longer sits alone two columns out — it pairs with Backspace, and both
are genuine outer-pinky reaches. `docs/half-left-staggered.svg`,
`docs/half-right-staggered.svg`.
`\` has no equivalent escape — it either gets its own outer column, moves onto
a layer, or takes a thumb slot.
Still open: the right thumb is carrying **five** keys (Space / Alt / Win / Menu
/ Ctrl) and one thumb will not cover five. Menu is the obvious deletion.
### Tenting
docs/bom.csv
+4 -4
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@@ -16,8 +16,8 @@ ALL,MCU,R1-R2,2,22R 0402,FRC0402F22R0TS,C2929994,0402,Extended,0.0007,"USB D+/D-
ALL,MCU,R3-R4,2,5.1k 0402,JLC basic library,-,0402,Basic,0.002,"USB-C CC1/CC2 pull-DOWN (Rd - device side)"
ALL,MCU,R5,1,1.5k 0402,JLC basic library,-,0402,Basic,0.002,"*** SWAP-DEPENDENT *** D+ pull-up. POPULATE for STM32F103. DNF for CH32L103 (internal 1.5k via RB_UC_DEV_PU_EN)"
ALL,MCU,R6-R7,2,10k 0402,FRC0402F1002TS,C25744,0402,Basic,0.003,"BOOT0 pulldown, BOOT1/PB2 pulldown"
HALF-L,Matrix,D1-D36,36,1N4148W,1N4148W,C81598,SOD-123,Basic,0.011,"Left half: 36 keys"
HALF-R,Matrix,D1-D39,39,1N4148W,1N4148W,C81598,SOD-123,Basic,0.011,"Right half: 39 keys"
HALF-L,Matrix,D1-D34,34,1N4148W,1N4148W,C81598,SOD-123,Basic,0.011,"Left half: 34 keys, six clean columns"
HALF-R,Matrix,D1-D41,41,1N4148W,1N4148W,C81598,SOD-123,Basic,0.011,"Right half: 41 keys"
HALF-L/R,Split,R14,1,100R 0402,JLC basic library,-,0402,Basic,0.002,"Series on the SBU net between connector and MCU USART pin"
HALF-L/R,Split,D-ESD,1,ESD 5V bidirectional,PESD5V0S1BA,C2827694,SOD-323,Extended,0.036,"On the SBU net - user-exposed signal going to a GPIO"
HALF-L/R,Split,J3,1,3-pin header DNF,JST SH,-,-,Consigned,0.02,"*** DNF INSURANCE *** VCC/GND/DATA fallback if SBU proves flaky (bad cables). 3 pads cost nothing"
@@ -36,8 +36,8 @@ NUMPAD,Hub,U8-U10,3,Ideal diode / OCP,CH213K,C5456874,SOT-23-3,Extended,0.073,"V
NUMPAD,Hub,R8-R13,6,56k 0402,FRC0402F5602TS,C2906875,0402,Extended,0.0018,"Rp pull-UPS on CC1/CC2 of each downstream port - host side. NOT 5.1k"
NUMPAD,SBU,-,-,SBU PASS-THROUGH,-,-,-,-,0.00,"*** Passive trace *** Tie SBU1+SBU2 on J5 (left half) and on J6 (right half), then connect the two nets together. Carries QMK split_common UART between the halves. Numpad MCU does NOT touch this net"
NUMPAD,SBU,D-ESD2,2,ESD 5V bidirectional,PESD5V0S1BA,C2827694,SOD-323,Extended,0.036,"One per half-port SBU net"
HALF-L,Switches,SW-,36,MX hotswap socket,CPG151101S11,C41430893,SMD 14.5x5.9mm,Extended,0.037,"BOTTOM SIDE. Alt: C49352235"
HALF-R,Switches,SW-,39,MX hotswap socket,CPG151101S11,C41430893,SMD 14.5x5.9mm,Extended,0.037,"BOTTOM SIDE. Alt: C49352235"
HALF-L,Switches,SW-,34,MX hotswap socket,CPG151101S11,C41430893,SMD 14.5x5.9mm,Extended,0.037,"BOTTOM SIDE. Alt: C49352235"
HALF-R,Switches,SW-,41,MX hotswap socket,CPG151101S11,C41430893,SMD 14.5x5.9mm,Extended,0.037,"BOTTOM SIDE. Alt: C49352235"
NUMPAD,Switches,SW-,25,MX hotswap socket,CPG151101S11,C41430893,SMD 14.5x5.9mm,Extended,0.037,"One per key. BOTTOM SIDE"
NOTE,Assembly,-,-,SINGLE-SIDED,-,-,-,-,-,"Put ALL SMD on the BOTTOM: sockets, MCU, passives, diodes, and any reverse-mount SK6812MINI-E. Top face bare except switch holes. Keeps JLC to one assembly pass"
NOTE,Mechanical,-,-,PLATE REQUIRED,-,-,-,-,-,"Hotswap needs a switch plate or socket pads tear off during switch insertion. FR4 plate = just another JLC board"
1 Board Section Ref Qty Value MPN LCSC Package JLC Unit USD Notes
16 ALL MCU R3-R4 2 5.1k 0402 JLC basic library - 0402 Basic 0.002 USB-C CC1/CC2 pull-DOWN (Rd - device side)
17 ALL MCU R5 1 1.5k 0402 JLC basic library - 0402 Basic 0.002 *** SWAP-DEPENDENT *** D+ pull-up. POPULATE for STM32F103. DNF for CH32L103 (internal 1.5k via RB_UC_DEV_PU_EN)
18 ALL MCU R6-R7 2 10k 0402 FRC0402F1002TS C25744 0402 Basic 0.003 BOOT0 pulldown, BOOT1/PB2 pulldown
19 HALF-L Matrix D1-D36 D1-D34 36 34 1N4148W 1N4148W C81598 SOD-123 Basic 0.011 Left half: 36 keys Left half: 34 keys, six clean columns
20 HALF-R Matrix D1-D39 D1-D41 39 41 1N4148W 1N4148W C81598 SOD-123 Basic 0.011 Right half: 39 keys Right half: 41 keys
21 HALF-L/R Split R14 1 100R 0402 JLC basic library - 0402 Basic 0.002 Series on the SBU net between connector and MCU USART pin
22 HALF-L/R Split D-ESD 1 ESD 5V bidirectional PESD5V0S1BA C2827694 SOD-323 Extended 0.036 On the SBU net - user-exposed signal going to a GPIO
23 HALF-L/R Split J3 1 3-pin header DNF JST SH - - Consigned 0.02 *** DNF INSURANCE *** VCC/GND/DATA fallback if SBU proves flaky (bad cables). 3 pads cost nothing
36 NUMPAD Hub R8-R13 6 56k 0402 FRC0402F5602TS C2906875 0402 Extended 0.0018 Rp pull-UPS on CC1/CC2 of each downstream port - host side. NOT 5.1k
37 NUMPAD SBU - - SBU PASS-THROUGH - - - - 0.00 *** Passive trace *** Tie SBU1+SBU2 on J5 (left half) and on J6 (right half), then connect the two nets together. Carries QMK split_common UART between the halves. Numpad MCU does NOT touch this net
38 NUMPAD SBU D-ESD2 2 ESD 5V bidirectional PESD5V0S1BA C2827694 SOD-323 Extended 0.036 One per half-port SBU net
39 HALF-L Switches SW- 36 34 MX hotswap socket CPG151101S11 C41430893 SMD 14.5x5.9mm Extended 0.037 BOTTOM SIDE. Alt: C49352235
40 HALF-R Switches SW- 39 41 MX hotswap socket CPG151101S11 C41430893 SMD 14.5x5.9mm Extended 0.037 BOTTOM SIDE. Alt: C49352235
41 NUMPAD Switches SW- 25 MX hotswap socket CPG151101S11 C41430893 SMD 14.5x5.9mm Extended 0.037 One per key. BOTTOM SIDE
42 NOTE Assembly - - SINGLE-SIDED - - - - - Put ALL SMD on the BOTTOM: sockets, MCU, passives, diodes, and any reverse-mount SK6812MINI-E. Top face bare except switch holes. Keeps JLC to one assembly pass
43 NOTE Mechanical - - PLATE REQUIRED - - - - - Hotswap needs a switch plate or socket pads tear off during switch insertion. FR4 plate = just another JLC board
docs/half-left-staggered.svg
+43 -46
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@@ -1,47 +1,44 @@
<svg width="100%" viewBox="0 0 680 721" role="img" xmlns="http://www.w3.org/2000/svg">
<title>Left half, column-staggered with a thumb cluster</title>
<desc>The same thirty-six keys as the straight 104 split, but each column offset vertically to match finger length, and the spacebar broken into a four-key thumb cluster stepped below the inner columns.</desc>
<text class="th" x="18" y="24">Left half &#8212; column stagger + thumb cluster</text>
<text class="ts" x="18" y="44">Same 36 keys. Columns offset for finger length; the spacebar row becomes a thumb cluster.</text>
<g class="c-teal"><rect x="88" y="108" width="66" height="66" rx="4" stroke-width="0.5"/><text class="ts" x="121" y="144" text-anchor="middle">Esc</text></g>
<g class="c-teal"><rect x="88" y="205" width="66" height="66" rx="4" stroke-width="0.5"/><text class="ts" x="121" y="241" text-anchor="middle">`</text></g>
<g class="c-teal"><rect x="88" y="277" width="66" height="66" rx="4" stroke-width="0.5"/><text class="ts" x="121" y="313" text-anchor="middle">Tab</text></g>
<g class="c-teal"><rect x="88" y="349" width="66" height="66" rx="4" stroke-width="0.5"/><text class="ts" x="121" y="385" text-anchor="middle">Caps</text></g>
<g class="c-teal"><rect x="88" y="421" width="66" height="66" rx="4" stroke-width="0.5"/><text class="ts" x="121" y="457" text-anchor="middle">Shift</text></g>
<g class="c-teal"><rect x="160" y="104" width="66" height="66" rx="4" stroke-width="0.5"/><text class="ts" x="193" y="140" text-anchor="middle">F1</text></g>
<g class="c-teal"><rect x="160" y="200" width="66" height="66" rx="4" stroke-width="0.5"/><text class="ts" x="193" y="236" text-anchor="middle">1</text></g>
<g class="c-teal"><rect x="160" y="272" width="66" height="66" rx="4" stroke-width="0.5"/><text class="ts" x="193" y="308" text-anchor="middle">Q</text></g>
<g class="c-teal"><rect x="160" y="344" width="66" height="66" rx="4" stroke-width="0.5"/><text class="ts" x="193" y="380" text-anchor="middle">A</text></g>
<g class="c-teal"><rect x="160" y="416" width="66" height="66" rx="4" stroke-width="0.5"/><text class="ts" x="193" y="452" text-anchor="middle">Z</text></g>
<g class="c-teal"><rect x="232" y="88" width="66" height="66" rx="4" stroke-width="0.5"/><text class="ts" x="265" y="124" text-anchor="middle">F2</text></g>
<g class="c-teal"><rect x="232" y="185" width="66" height="66" rx="4" stroke-width="0.5"/><text class="ts" x="265" y="221" text-anchor="middle">2</text></g>
<g class="c-teal"><rect x="232" y="257" width="66" height="66" rx="4" stroke-width="0.5"/><text class="ts" x="265" y="293" text-anchor="middle">W</text></g>
<g class="c-teal"><rect x="232" y="329" width="66" height="66" rx="4" stroke-width="0.5"/><text class="ts" x="265" y="365" text-anchor="middle">S</text></g>
<g class="c-teal"><rect x="232" y="401" width="66" height="66" rx="4" stroke-width="0.5"/><text class="ts" x="265" y="437" text-anchor="middle">X</text></g>
<g class="c-teal"><rect x="304" y="78" width="66" height="66" rx="4" stroke-width="0.5"/><text class="ts" x="337" y="114" text-anchor="middle">F3</text></g>
<g class="c-teal"><rect x="304" y="174" width="66" height="66" rx="4" stroke-width="0.5"/><text class="ts" x="337" y="210" text-anchor="middle">3</text></g>
<g class="c-teal"><rect x="304" y="246" width="66" height="66" rx="4" stroke-width="0.5"/><text class="ts" x="337" y="282" text-anchor="middle">E</text></g>
<g class="c-teal"><rect x="304" y="318" width="66" height="66" rx="4" stroke-width="0.5"/><text class="ts" x="337" y="354" text-anchor="middle">D</text></g>
<g class="c-teal"><rect x="304" y="390" width="66" height="66" rx="4" stroke-width="0.5"/><text class="ts" x="337" y="426" text-anchor="middle">C</text></g>
<g class="c-teal"><rect x="376" y="85" width="66" height="66" rx="4" stroke-width="0.5"/><text class="ts" x="409" y="121" text-anchor="middle">F4</text></g>
<g class="c-teal"><rect x="376" y="182" width="66" height="66" rx="4" stroke-width="0.5"/><text class="ts" x="409" y="218" text-anchor="middle">4</text></g>
<g class="c-teal"><rect x="376" y="254" width="66" height="66" rx="4" stroke-width="0.5"/><text class="ts" x="409" y="290" text-anchor="middle">R</text></g>
<g class="c-teal"><rect x="376" y="326" width="66" height="66" rx="4" stroke-width="0.5"/><text class="ts" x="409" y="362" text-anchor="middle">F</text></g>
<g class="c-teal"><rect x="376" y="398" width="66" height="66" rx="4" stroke-width="0.5"/><text class="ts" x="409" y="434" text-anchor="middle">V</text></g>
<g class="c-teal"><rect x="448" y="97" width="66" height="66" rx="4" stroke-width="0.5"/><text class="ts" x="481" y="133" text-anchor="middle">F5</text></g>
<g class="c-teal"><rect x="448" y="193" width="66" height="66" rx="4" stroke-width="0.5"/><text class="ts" x="481" y="229" text-anchor="middle">5</text></g>
<g class="c-teal"><rect x="448" y="265" width="66" height="66" rx="4" stroke-width="0.5"/><text class="ts" x="481" y="301" text-anchor="middle">T</text></g>
<g class="c-teal"><rect x="448" y="337" width="66" height="66" rx="4" stroke-width="0.5"/><text class="ts" x="481" y="373" text-anchor="middle">G</text></g>
<g class="c-teal"><rect x="448" y="409" width="66" height="66" rx="4" stroke-width="0.5"/><text class="ts" x="481" y="445" text-anchor="middle">B</text></g>
<g class="c-teal"><rect x="520" y="108" width="66" height="66" rx="4" stroke-width="0.5"/><text class="ts" x="553" y="144" text-anchor="middle">F6</text></g>
<g class="c-teal"><rect x="520" y="205" width="66" height="66" rx="4" stroke-width="0.5"/><text class="ts" x="553" y="241" text-anchor="middle">6</text></g>
<g class="c-coral"><rect x="272" y="514" width="66" height="66" rx="4" stroke-width="0.5"/><text class="ts" x="305" y="550" text-anchor="middle">Ctrl</text></g>
<g class="c-coral"><rect x="344" y="524" width="66" height="66" rx="4" stroke-width="0.5"/><text class="ts" x="377" y="560" text-anchor="middle">Win</text></g>
<g class="c-coral"><rect x="416" y="537" width="66" height="66" rx="4" stroke-width="0.5"/><text class="ts" x="449" y="573" text-anchor="middle">Alt</text></g>
<g class="c-coral"><rect x="488" y="553" width="102" height="66" rx="4" stroke-width="0.5"/><text class="ts" x="539" y="589" text-anchor="middle">Space</text></g>
<g class="c-teal"><rect x="18" y="659" width="13" height="13" rx="3" stroke-width="0.5"/></g>
<text class="ts" x="37" y="669">Alphas &#183; 32, column-staggered</text>
<g class="c-coral"><rect x="318" y="659" width="13" height="13" rx="3" stroke-width="0.5"/></g>
<text class="ts" x="337" y="669">Thumb cluster &#183; 4</text>
<text class="ts" x="18" y="699">Middle-finger column sits highest, pinky and inner-reach columns drop ~0.4u. Thumb keys step down and inward.</text>
<svg width="100%" viewBox="0 0 680 706" role="img" xmlns="http://www.w3.org/2000/svg">
<title>Left half &#8212; 34 keys, six clean columns</title><desc>6 and F6 moved to the right half. Every column is now five keys deep.</desc>
<text class="th" x="18" y="24">Left half &#8212; 34 keys, six clean columns</text>
<text class="ts" x="18" y="44">6 and F6 moved to the right half. Every column is now five keys deep.</text>
<g class="c-teal"><rect x="130" y="107" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="162" y="142" text-anchor="middle">Esc</text></g>
<g class="c-teal"><rect x="130" y="201" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="162" y="236" text-anchor="middle">`</text></g>
<g class="c-teal"><rect x="130" y="271" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="162" y="306" text-anchor="middle">Tab</text></g>
<g class="c-teal"><rect x="130" y="341" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="162" y="376" text-anchor="middle">Caps</text></g>
<g class="c-teal"><rect x="130" y="411" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="162" y="446" text-anchor="middle">Shift</text></g>
<g class="c-teal"><rect x="200" y="103" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="232" y="138" text-anchor="middle">F1</text></g>
<g class="c-teal"><rect x="200" y="197" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="232" y="232" text-anchor="middle">1</text></g>
<g class="c-teal"><rect x="200" y="267" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="232" y="302" text-anchor="middle">Q</text></g>
<g class="c-teal"><rect x="200" y="337" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="232" y="372" text-anchor="middle">A</text></g>
<g class="c-teal"><rect x="200" y="407" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="232" y="442" text-anchor="middle">Z</text></g>
<g class="c-teal"><rect x="270" y="88" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="302" y="123" text-anchor="middle">F2</text></g>
<g class="c-teal"><rect x="270" y="182" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="302" y="217" text-anchor="middle">2</text></g>
<g class="c-teal"><rect x="270" y="252" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="302" y="287" text-anchor="middle">W</text></g>
<g class="c-teal"><rect x="270" y="322" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="302" y="357" text-anchor="middle">S</text></g>
<g class="c-teal"><rect x="270" y="392" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="302" y="427" text-anchor="middle">X</text></g>
<g class="c-teal"><rect x="340" y="78" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="372" y="113" text-anchor="middle">F3</text></g>
<g class="c-teal"><rect x="340" y="172" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="372" y="207" text-anchor="middle">3</text></g>
<g class="c-teal"><rect x="340" y="242" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="372" y="277" text-anchor="middle">E</text></g>
<g class="c-teal"><rect x="340" y="312" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="372" y="347" text-anchor="middle">D</text></g>
<g class="c-teal"><rect x="340" y="382" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="372" y="417" text-anchor="middle">C</text></g>
<g class="c-teal"><rect x="410" y="85" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="442" y="120" text-anchor="middle">F4</text></g>
<g class="c-teal"><rect x="410" y="179" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="442" y="214" text-anchor="middle">4</text></g>
<g class="c-teal"><rect x="410" y="249" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="442" y="284" text-anchor="middle">R</text></g>
<g class="c-teal"><rect x="410" y="319" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="442" y="354" text-anchor="middle">F</text></g>
<g class="c-teal"><rect x="410" y="389" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="442" y="424" text-anchor="middle">V</text></g>
<g class="c-teal"><rect x="480" y="96" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="512" y="131" text-anchor="middle">F5</text></g>
<g class="c-teal"><rect x="480" y="190" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="512" y="225" text-anchor="middle">5</text></g>
<g class="c-teal"><rect x="480" y="260" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="512" y="295" text-anchor="middle">T</text></g>
<g class="c-teal"><rect x="480" y="330" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="512" y="365" text-anchor="middle">G</text></g>
<g class="c-teal"><rect x="480" y="400" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="512" y="435" text-anchor="middle">B</text></g>
<g class="c-coral"><rect x="238" y="502" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="270" y="537" text-anchor="middle">Ctrl</text></g>
<g class="c-coral"><rect x="308" y="512" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="340" y="547" text-anchor="middle">Win</text></g>
<g class="c-coral"><rect x="378" y="525" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="410" y="560" text-anchor="middle">Alt</text></g>
<g class="c-coral"><rect x="448" y="540" width="99" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="498" y="575" text-anchor="middle">Space</text></g>
<g class="c-teal"><rect x="18" y="644" width="13" height="13" rx="3" stroke-width="0.5"/></g>
<text class="ts" x="37" y="654">Alphas &#183; 30</text>
<g class="c-coral"><rect x="268" y="644" width="13" height="13" rx="3" stroke-width="0.5"/></g>
<text class="ts" x="287" y="654">Thumb cluster &#183; 4</text>
<text class="ts" x="18" y="684">Six columns, no orphans. ~6u wide, about 114 mm.</text>
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docs/half-right-staggered.svg
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<svg width="100%" viewBox="0 0 680 675" role="img" xmlns="http://www.w3.org/2000/svg">
<title>Right half, column-staggered with a thumb cluster</title>
<desc>Thirty-nine keys in eight columns. Six clean finger columns, then a ragged outer pinky edge holding Backspace, right bracket and Enter, plus a single backslash beyond it.</desc>
<text class="th" x="18" y="24">Right half &#8212; column stagger + thumb cluster</text>
<text class="ts" x="18" y="44">Same 39 keys. Six clean columns, then the outer pinky edge goes ragged.</text>
<g class="c-purple"><rect x="52" y="95" width="60" height="60" rx="4" stroke-width="0.5"/><text class="ts" x="82" y="128" text-anchor="middle">F7</text></g>
<g class="c-purple"><rect x="52" y="184" width="60" height="60" rx="4" stroke-width="0.5"/><text class="ts" x="82" y="217" text-anchor="middle">7</text></g>
<g class="c-purple"><rect x="52" y="250" width="60" height="60" rx="4" stroke-width="0.5"/><text class="ts" x="82" y="283" text-anchor="middle">Y</text></g>
<g class="c-purple"><rect x="52" y="316" width="60" height="60" rx="4" stroke-width="0.5"/><text class="ts" x="82" y="349" text-anchor="middle">H</text></g>
<g class="c-purple"><rect x="52" y="382" width="60" height="60" rx="4" stroke-width="0.5"/><text class="ts" x="82" y="415" text-anchor="middle">N</text></g>
<g class="c-purple"><rect x="118" y="85" width="60" height="60" rx="4" stroke-width="0.5"/><text class="ts" x="148" y="118" text-anchor="middle">F8</text></g>
<g class="c-purple"><rect x="118" y="173" width="60" height="60" rx="4" stroke-width="0.5"/><text class="ts" x="148" y="206" text-anchor="middle">8</text></g>
<g class="c-purple"><rect x="118" y="239" width="60" height="60" rx="4" stroke-width="0.5"/><text class="ts" x="148" y="272" text-anchor="middle">U</text></g>
<g class="c-purple"><rect x="118" y="305" width="60" height="60" rx="4" stroke-width="0.5"/><text class="ts" x="148" y="338" text-anchor="middle">J</text></g>
<g class="c-purple"><rect x="118" y="371" width="60" height="60" rx="4" stroke-width="0.5"/><text class="ts" x="148" y="404" text-anchor="middle">M</text></g>
<g class="c-purple"><rect x="184" y="78" width="60" height="60" rx="4" stroke-width="0.5"/><text class="ts" x="214" y="111" text-anchor="middle">F9</text></g>
<g class="c-purple"><rect x="184" y="166" width="60" height="60" rx="4" stroke-width="0.5"/><text class="ts" x="214" y="199" text-anchor="middle">9</text></g>
<g class="c-purple"><rect x="184" y="232" width="60" height="60" rx="4" stroke-width="0.5"/><text class="ts" x="214" y="265" text-anchor="middle">I</text></g>
<g class="c-purple"><rect x="184" y="298" width="60" height="60" rx="4" stroke-width="0.5"/><text class="ts" x="214" y="331" text-anchor="middle">K</text></g>
<g class="c-purple"><rect x="184" y="364" width="60" height="60" rx="4" stroke-width="0.5"/><text class="ts" x="214" y="397" text-anchor="middle">,</text></g>
<g class="c-purple"><rect x="250" y="87" width="60" height="60" rx="4" stroke-width="0.5"/><text class="ts" x="280" y="120" text-anchor="middle">F10</text></g>
<g class="c-purple"><rect x="250" y="176" width="60" height="60" rx="4" stroke-width="0.5"/><text class="ts" x="280" y="209" text-anchor="middle">0</text></g>
<g class="c-purple"><rect x="250" y="242" width="60" height="60" rx="4" stroke-width="0.5"/><text class="ts" x="280" y="275" text-anchor="middle">O</text></g>
<g class="c-purple"><rect x="250" y="308" width="60" height="60" rx="4" stroke-width="0.5"/><text class="ts" x="280" y="341" text-anchor="middle">L</text></g>
<g class="c-purple"><rect x="250" y="374" width="60" height="60" rx="4" stroke-width="0.5"/><text class="ts" x="280" y="407" text-anchor="middle">.</text></g>
<g class="c-purple"><rect x="316" y="102" width="60" height="60" rx="4" stroke-width="0.5"/><text class="ts" x="346" y="135" text-anchor="middle">F11</text></g>
<g class="c-purple"><rect x="316" y="190" width="60" height="60" rx="4" stroke-width="0.5"/><text class="ts" x="346" y="223" text-anchor="middle">-</text></g>
<g class="c-purple"><rect x="316" y="256" width="60" height="60" rx="4" stroke-width="0.5"/><text class="ts" x="346" y="289" text-anchor="middle">P</text></g>
<g class="c-purple"><rect x="316" y="322" width="60" height="60" rx="4" stroke-width="0.5"/><text class="ts" x="346" y="355" text-anchor="middle">;</text></g>
<g class="c-purple"><rect x="316" y="388" width="60" height="60" rx="4" stroke-width="0.5"/><text class="ts" x="346" y="421" text-anchor="middle">/</text></g>
<g class="c-purple"><rect x="382" y="106" width="60" height="60" rx="4" stroke-width="0.5"/><text class="ts" x="412" y="139" text-anchor="middle">F12</text></g>
<g class="c-purple"><rect x="382" y="194" width="60" height="60" rx="4" stroke-width="0.5"/><text class="ts" x="412" y="227" text-anchor="middle">=</text></g>
<g class="c-purple"><rect x="382" y="260" width="60" height="60" rx="4" stroke-width="0.5"/><text class="ts" x="412" y="293" text-anchor="middle">[</text></g>
<g class="c-purple"><rect x="382" y="326" width="60" height="60" rx="4" stroke-width="0.5"/><text class="ts" x="412" y="359" text-anchor="middle">'</text></g>
<g class="c-purple"><rect x="382" y="392" width="60" height="60" rx="4" stroke-width="0.5"/><text class="ts" x="412" y="425" text-anchor="middle">Shift</text></g>
<g class="c-purple"><rect x="448" y="194" width="60" height="60" rx="4" stroke-width="0.5"/><text class="ts" x="478" y="227" text-anchor="middle">Bksp</text></g>
<g class="c-purple"><rect x="448" y="260" width="60" height="60" rx="4" stroke-width="0.5"/><text class="ts" x="478" y="293" text-anchor="middle">]</text></g>
<g class="c-purple"><rect x="448" y="326" width="60" height="60" rx="4" stroke-width="0.5"/><text class="ts" x="478" y="359" text-anchor="middle">Enter</text></g>
<g class="c-purple"><rect x="514" y="260" width="60" height="60" rx="4" stroke-width="0.5"/><text class="ts" x="544" y="293" text-anchor="middle">\</text></g>
<g class="c-coral"><rect x="148" y="514" width="93" height="60" rx="4" stroke-width="0.5"/><text class="ts" x="194" y="547" text-anchor="middle">Space</text></g>
<g class="c-coral"><rect x="247" y="499" width="60" height="60" rx="4" stroke-width="0.5"/><text class="ts" x="277" y="532" text-anchor="middle">Alt</text></g>
<g class="c-coral"><rect x="313" y="487" width="60" height="60" rx="4" stroke-width="0.5"/><text class="ts" x="343" y="520" text-anchor="middle">Win</text></g>
<g class="c-coral"><rect x="379" y="478" width="60" height="60" rx="4" stroke-width="0.5"/><text class="ts" x="409" y="511" text-anchor="middle">Menu</text></g>
<g class="c-coral"><rect x="445" y="471" width="60" height="60" rx="4" stroke-width="0.5"/><text class="ts" x="475" y="504" text-anchor="middle">Ctrl</text></g>
<g class="c-purple"><rect x="18" y="613" width="13" height="13" rx="3" stroke-width="0.5"/></g>
<text class="ts" x="37" y="623">Alphas &#183; 34</text>
<g class="c-coral"><rect x="268" y="613" width="13" height="13" rx="3" stroke-width="0.5"/></g>
<text class="ts" x="287" y="623">Thumb cluster &#183; 5</text>
<text class="ts" x="18" y="653">Backslash ends up alone in an eighth column &#8212; the same artifact as the left half&#8217;s lonely 6, but further out.</text>
<svg width="100%" viewBox="0 0 680 706" role="img" xmlns="http://www.w3.org/2000/svg">
<title>Right half &#8212; 41 keys</title><desc>Top two rows shifted over: 6 and F6 now lead the right hand, above Y.</desc>
<text class="th" x="18" y="24">Right half &#8212; 41 keys</text>
<text class="ts" x="18" y="44">Top two rows shifted over: 6 and F6 now lead the right hand, above Y.</text>
<g class="c-purple"><rect x="60" y="96" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="92" y="131" text-anchor="middle">F6</text></g>
<g class="c-purple"><rect x="60" y="190" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="92" y="225" text-anchor="middle">6</text></g>
<g class="c-purple"><rect x="60" y="260" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="92" y="295" text-anchor="middle">Y</text></g>
<g class="c-purple"><rect x="60" y="330" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="92" y="365" text-anchor="middle">H</text></g>
<g class="c-purple"><rect x="60" y="400" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="92" y="435" text-anchor="middle">N</text></g>
<g class="c-purple"><rect x="130" y="85" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="162" y="120" text-anchor="middle">F7</text></g>
<g class="c-purple"><rect x="130" y="179" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="162" y="214" text-anchor="middle">7</text></g>
<g class="c-purple"><rect x="130" y="249" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="162" y="284" text-anchor="middle">U</text></g>
<g class="c-purple"><rect x="130" y="319" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="162" y="354" text-anchor="middle">J</text></g>
<g class="c-purple"><rect x="130" y="389" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="162" y="424" text-anchor="middle">M</text></g>
<g class="c-purple"><rect x="200" y="78" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="232" y="113" text-anchor="middle">F8</text></g>
<g class="c-purple"><rect x="200" y="172" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="232" y="207" text-anchor="middle">8</text></g>
<g class="c-purple"><rect x="200" y="242" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="232" y="277" text-anchor="middle">I</text></g>
<g class="c-purple"><rect x="200" y="312" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="232" y="347" text-anchor="middle">K</text></g>
<g class="c-purple"><rect x="200" y="382" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="232" y="417" text-anchor="middle">,</text></g>
<g class="c-purple"><rect x="270" y="88" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="302" y="123" text-anchor="middle">F9</text></g>
<g class="c-purple"><rect x="270" y="182" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="302" y="217" text-anchor="middle">9</text></g>
<g class="c-purple"><rect x="270" y="252" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="302" y="287" text-anchor="middle">O</text></g>
<g class="c-purple"><rect x="270" y="322" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="302" y="357" text-anchor="middle">L</text></g>
<g class="c-purple"><rect x="270" y="392" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="302" y="427" text-anchor="middle">.</text></g>
<g class="c-purple"><rect x="340" y="103" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="372" y="138" text-anchor="middle">F10</text></g>
<g class="c-purple"><rect x="340" y="197" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="372" y="232" text-anchor="middle">0</text></g>
<g class="c-purple"><rect x="340" y="267" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="372" y="302" text-anchor="middle">P</text></g>
<g class="c-purple"><rect x="340" y="337" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="372" y="372" text-anchor="middle">;</text></g>
<g class="c-purple"><rect x="340" y="407" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="372" y="442" text-anchor="middle">/</text></g>
<g class="c-purple"><rect x="410" y="107" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="442" y="142" text-anchor="middle">F11</text></g>
<g class="c-purple"><rect x="410" y="201" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="442" y="236" text-anchor="middle">-</text></g>
<g class="c-purple"><rect x="410" y="271" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="442" y="306" text-anchor="middle">[</text></g>
<g class="c-purple"><rect x="410" y="341" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="442" y="376" text-anchor="middle">'</text></g>
<g class="c-purple"><rect x="410" y="411" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="442" y="446" text-anchor="middle">Shift</text></g>
<g class="c-purple"><rect x="480" y="107" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="512" y="142" text-anchor="middle">F12</text></g>
<g class="c-purple"><rect x="480" y="201" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="512" y="236" text-anchor="middle">=</text></g>
<g class="c-purple"><rect x="480" y="271" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="512" y="306" text-anchor="middle">]</text></g>
<g class="c-purple"><rect x="480" y="341" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="512" y="376" text-anchor="middle">Enter</text></g>
<g class="c-purple"><rect x="550" y="201" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="582" y="236" text-anchor="middle">Bksp</text></g>
<g class="c-purple"><rect x="550" y="271" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="582" y="306" text-anchor="middle">\</text></g>
<g class="c-coral"><rect x="162" y="540" width="99" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="211" y="575" text-anchor="middle">Space</text></g>
<g class="c-coral"><rect x="266" y="525" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="298" y="560" text-anchor="middle">Alt</text></g>
<g class="c-coral"><rect x="336" y="512" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="368" y="547" text-anchor="middle">Win</text></g>
<g class="c-coral"><rect x="406" y="502" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="438" y="537" text-anchor="middle">Menu</text></g>
<g class="c-coral"><rect x="476" y="495" width="64" height="64" rx="4" stroke-width="0.5"/><text class="ts" x="508" y="530" text-anchor="middle">Ctrl</text></g>
<g class="c-purple"><rect x="18" y="644" width="13" height="13" rx="3" stroke-width="0.5"/></g>
<text class="ts" x="37" y="654">Alphas &#183; 36</text>
<g class="c-coral"><rect x="268" y="644" width="13" height="13" rx="3" stroke-width="0.5"/></g>
<text class="ts" x="287" y="654">Thumb cluster &#183; 5</text>
<text class="ts" x="18" y="684">Six full columns, then F12/=/]/Enter, then Bksp and backslash sharing the outer column.</text>
</svg>
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