Just spotted this thread, and I see konstantin has already mentioned the use of [べ] and [ぺ] rather than [゛] and [゜] or [⬚゛] and [⬚゜] (the marks should go *inside* the boxes, but I don't know how to type that here...)
Another issue is with regards the layout of the hiragana alphas. I'd like to propose the following modifications which I have mentioned on some other kana monolegend ICs (and konstantin has been fighting the good fight as well!). These are as follows:
- Add an R1 [ー] key, or replace R1 [ろ] or [む] with [ー]
- Add an R3 [む] key
- Add an R4 [ろ] key
These changes would allow you to support both ISO and JIS users on top of ANSI, and if you choose to replace R1 ろ with ー and "move" R1 む to R3, you can get away with only adding one additional key (R4 ろ). If you still wish to support R1 ろ and む, you can do so with just a couple of extra keys.
This is a really nice, clean-looking set, so I'd love to see it succeed! The changes I've proposed will make the hiragana alphas more generally useful.
Other keys that are useful for building JIS layouts are:
- A 2U Shift key
- A 3U Space bar
I can't quite tell from your renders whether you have these; it looks to me like there might be a 2U shift in there, which is great -- of the two, I'd say that was the more important. The 3U space is useful if you're building a board with henkan/muhenkan buttons either side of the space bar, but it's slightly more complicated as different boards use different size space bars. I'm planning on writing a full post about this once I've done some more research into all the options, but for now I think the best bet for JIS users who want henkan/muhenkan buttons is to build a 60% board using GH60's minila layout, which uses a 3U spacebar.