I was going to convert this 24 pin controller to a 13 pin controller; it's not a hard mod to do, but I got bogged down in wanting to get a mural painted on the front - which ended up was going to cost more than the guitar, and the upgrade kit, and the GR55 put together:
http://neophytte.mine.nu/photo/2016-03- … ontroller/
Forgot I also added a GK-3B to my Hohner bass:
http://neophytte.mine.nu/photo/2011-10-04-Hohner/
It was rather a tight fit:
