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The kit entered digits three ways and text no way at all, so the panels that need a WiFi password had nothing to reach for. R57 takes free alphanumeric text. A-Z is laid out alphabetically rather than QWERTY, the industrial convention wherever the operator isn't assumed to touch-type, and what makes this a faceplate instead of a keyboard.
I followed two reference plates and departed from both, arguing each departure at its site. Their letters are blue and the kit has no blue control colour, so letters take the standard pale cap and digits a darker one: the photos' two-tone grouping without the foreign hue. Letters sit left and digits right so the alphabet reads down one unbroken block. With the digits on the left it stops column-aligning with itself halfway down.
DEL is new, because without a backspace one mistyped character costs the whole entry. It sits beside the digits in amber while CLR is exiled to the corner in red. DEL is constant and costs a character, CLR is rare and costs everything, so the safe key gets the good spot and the colour grades the cost before the legend is read. CANCEL is gone: on a plate that is the whole terminal it has a transaction to abandon, but here it did exactly what CLR does.
The window draws spaces as ␣. SVG collapses whitespace, and past the truncation boundary there are no pad dots left for a space to displace, so SPACE was a keypress with no feedback at all. The buffer keeps the real character.
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Crossing Foley's elemental tasks against cardinality over the kit finds two empty cells: selecting one of a dynamic set (the device and network lists) and alphanumeric text entry (a WiFi password). Panels that already exist want both.
The cross needed an axis the note didn't carry. Cardinality lumps all one-of-N together, so a chicken-head selector and a WiFi list share a cell that then reads as covered. Set stability is what separates them. The axis is invisible from inside hardware, where every option set is engraved at manufacture. That's why a catalogue modelled on period gear goes blind exactly where its software consumers live.
The period answer to a changing set was never a control but a re-labelable slot: jukebox title strips, Rolodex cards, scribble strips. The slot is manufactured, the label isn't.
Reference photos supersede the teletype for text entry. They're all ABC-order industrial keypads, whose colour-coded CANCEL, CLEAR/NO and ENTER/YES land on the palette untranslated. A survey adds two idioms unlike a keypad: the index typewriter, which selects on one control and commits on another, and the chorded keyset, which has no key per letter at all.
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25 new cards, grammar note
Squash of the gallery-upgrades branch (25 commits). Usability: widget stages scale S/M/L (2.4x default), reading text at 12-13pt, a live palette section parsed from the generated :root block, screen-color families with per-card chips on the five screen widgets, and a collapsible spec sheet on every card (input model, solves, use, limits, origin, difficulty, prefer-when, period on the non-timeless).
Collection grew 84 → 109 cards, all CDP-verified: reference cards R32-R36 (mechanical timer, four-way rocker, four-way toggle, day-date discs, LED dot matrix), the takuzu-survey build R37-R47 plus the N23 alarm lifecycle (pin matrix, dead-man, rotary dial, breaker panel, DSKY, cam timer, attitude indicator, heading bug, flip-disc, dekatron, landing gear), the promoted banked six R48-R53 (knife switch, decade box, two-hand control, voice-loop keyset, blinkenlights, circular chart), and the Ki-57/comfort-meter trio R54-R56 (vertical tape, twin-needle, comfort-zone crossed needles).
Also: docs/design control-grammars reference note (taxonomy sources and proposed axes for the classification work), nine reference photos filed, and a component cleanup pass (dial digits above the finger wheel, legible demo defaults, unified captions).
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