It lives!!!
My power supply ended up getting lost in customs for two agonizing weeks with no indication of whether or not it had actually arrived in the US. But I went with the Konstant Lab BoardPWR and it’s perfect–super low profile and more than enough power for what I can fill this thing with. The final module layout will be different but I wanted to just get some modules in there and have something playable in the meantime. It’ll be a few months yet before I can afford all the final modules but I’m already having some good fun with this!
I decided against including any sort of cable holder or anything in the lid. It makes the most sense to just be able to close the lid and carry it around while patched, and it makes a great place for stickers which I usually don’t want to put on the outside of my instruments.