ah yeah regarding the programmable keyboard... it's not even that hard to do, although funny keys like a bitcoin key or whatever can be a bit funny, cos USB only sends key position signals, and depends on pc's interpreting them as regards to a layout, rather than sending a signal representing the symbol.

it can be done, but a different protocol has to be used for every different OS. i haven't dug into how to do that yet, though i wish i had the time to, it's a pain in the ass because i have already got a dvorak latin and custom russian cyrillic layout layer on mine but i have to press two rather complicated key sequences to switch between them, and for games, because so many older games especially make huge assumptions about keyboards don't for example, let you customise keys like "<> which on a dvorak keyboard are... yeah, right there where the WASD sits... so i have to also have a qwerty layer, and a button to switch that on and off.

if i had the compose key stuff set up right, and macros programmed in, i could eliminate that, have not just my dvorak, dvorak-russian/bulgarian and qwerty layout, i could have some easy keys to do portuguese and spanish and yugoslavian accents, since i can probably find excuses to be able to type in those languages as well.