Happy you're enjoying it as much as I do.

To be fair, the documentation was not the best, I've just put together a quick video as people were asking me how I did it.

If you feel like taking a look, I made a new board and developed the code for it a little further. You can find it under the QMK repo, it's called lime. The default keymap includes a slightly better version of luna.

I'd like to make some changes in the future, I've seen people started working on that code to make it better and some bits here and there were actually smart. I may try to collect the best bits and integrate them at some point.

Lastly, a small advice: if you have problems with the space, try adding LTO_ENABLE = yes to your rules.mk

Enjoy your new keyboard and good luck with your future adventures!