KUSOboard is a Longan Nano based keyboard using KarlK90's branch of QMK All info on Karl's branch and YAEMK can be found here: https://karlk90.github.io/yaemk-split-kb/
Regarding the naming of the files, I had started out meaning to make an Atreus size board, but decided against it shortly after starting the project. It was reduced to something more like a Reviung39.
album: https://imgur.com/a/PWmJwKW