Vortex Sound Research

I bought an ultranova a few years ago, the touch sensitivity on the touch encoders has never worked (well, the middle 4 sort of work briefly), but other than that they are fine.

The filter knob has always been pretty lose, and tends to jump values or just behave wierd if it's turned too fast. I'm somewhat convinced this is a firmware thing rather than hardware.

Not a knob, but my mod wheel is totally screwed and basically useless, and the pitch wheel doesn't quite return to 0 on release.

I suspect most of these issues can be fixed, but seeing as I use it more as a sound module, they don't really bother me, but I'd like to know if other users are experiencing similar issues with the controls.