Keyboard.io is one of the nicest pre-built ones. You can fully customize the layout of the Keyboard.io and get blank keycaps https://community.keyboard.io/t/wh

Keyboard.io is one of the nicest pre-built ones. You can fully customize the layout of the Keyboard.io and get blank keycaps https://community.keyboard.io/t/whats-the-latest-info-on-keycap-sets/2445/26 https://community.keyboard.io/t/whats-the-latest-info-on-key... You can get a barely used one for ~250 just watch their forums. I've got one 1-2 months ago after playing with a Kinesis. The keyboard is really nice. The firmware and software ecosystem around it is powerful but still lacks usability (you write plugins in C although they have a really nice graphical interface to configure it). https://github.com/keyboardio/Kaleidoscope https://github.com/keyboardio/Kaleidoscope