It's a split keyboard in 4 parts and 101 keys, though i could move the number pad and control pad to outside of the thumb keys if making a 4-piece keyboard is too hard or complicated.
Left thumb gets space, control, and super. Right gets space, hyper (just a 3rd layer), and alt. The keys next to T and N are repeat keys. Above Fn is escape and sleep. Above power is compose.
The control pad has cut, copy, paste, open, select all, save, undo, and redo.
I think that's every key i'll need, especially with a compose key and so much extra space available on the hyper layer.
Is there anything i've forgotten to consider? Anything i should know about split keyboards, or custom shapes in general?
More specific question, are 0.5u switches and caps available anywhere for all my small keys? I could replace most of them with full size keys fairly easily, but the 101st key on the number pad would make the layout asymmetrical.
You can extend the matrix across so it becomes one board, but it means custom wiring the connector.
See here: https://trashman.wiki/keyboards/caravan-2
Does mean more pins for large matrix
Chidori also can have three parts to the split using i think ic2, was a while since I built mine, see the expansion option
https://github.com/kagizaraya/chidori_build_guide/blob/master/README_en.md
Yeah, physically that will work. I should have mentioned that, as it's what I did (permanently wired) on my failure of an ergo split to get it split at all with one MCU, but electrically it worked perfectly fine. Proper USB-C/Thunderbolt like the caravan 2 seems like it would be a good solution for a PCB, and I'm curious what issues the mini HDMI produced (crosstalk maybe, or just complaining about sourcing mini to mini cables?). Ethernet or DB9 should do for hand-wired, though obviously bulkier.