Hi,
first of all, thanks to publish your project! Will build one soon.
But a idea came to my mind. This project is also a good starting point to build a wall switch which would be powered by a supply. So the idea is to also integrate status LEDs for each button. There are also some 3D printed hardware for this. So would it be a heavy lift to expose some (neopixel) channels? Just asking ;)

Greets