BigBagKbdTrixXKB VS pineapple60

I hope that someone can help me with the a problem using the XKB Colemak layouts from https://github.com/DreymaR/BigBagKbdTrixXKB. I am using Ubuntu MATE 20.04, and have configured qwerty and vanilla Colemak UK layouts in the MATE preferences. My XKB options include the Extend layer (triggered on Left Windows key) and swapping Caps Lock with Left Control.

DreymaR's Big Bag of XKB tricks implements an Extend layer with XKB (I haven't tried it tho)

The only thing I would love to see is a keyboard mod for something ergonomic. Something like the ThinKeys project, or the pineapple60 project. I'm not sure if I have the time, but maybe I could try my hand at prototyping something, if Framework has the relevant specs open-sourced and documented somewhere?

Here's another one that doesn't need individual row wires: https://github.com/saoto28/pineapple60/blob/main/p4/.

My dream setup with one of these would be to replace the keyboard and numpad with an ergodox as close to full-size as I could get it, something like this but with the halves angled, and with the thumb keys preserved.

Here is link number 1 - Previous text "p4"

AFAIK there's no equivalent for the console... but if you have the right Thinkpad you could try building a pineapple60 :)

Those new cherry switches would be useful for this project: https://github.com/saoto28/pineapple60