I built the rexxlp 12u a while ago but honestly 36 keys and miryoku is all I need. So when the 10u came out, thx @petejohanson@lemmy.world I had to build it.
It was a tiny challenge for me, due to not properly following the guide. My big fat learning was that the tape on top of the sockets really really makes sense - I had some shorts between pins and then some socket pins were not even connected after I pulled out the board (XIAO ble) with too much force. Now I know.