So I finally got around to finishing my MB6582. Just some final troubleshooting left (I hope):
All the encoders have some random behavior to them. They will be working fine and then suddenly the value will jump a couple of steps in a random direction, even when I'm just making a small adjustment. As I said this goes for all of them, including the one where I didn't remove the detent.
Uploaded the standard patches but some of them are acting weird. Some are fine, some wont make any sound and some are very quiet so that I have to crank the volume to hear them. I only have one 8580 installed and I did change the setting to mono in the ensemble menu.
Suggestions are highly appreciated :)