images via
this auction, via SillonS.
"Mods I did:
Hardware:
- Increase Env Mod Range
- Increase Accent Range
- Increased Filter Low End
I also tried out the Bass Boost and Resonance Boost mods but I didn't lilke the sound it provided, too far from the original, so I took them out. Matter of taste i guess.

Software:
- Firmware SokkOS
(this one brings lot of new features like Loop Mode, Play backwards, Step-edit when playing in edit-mode, Pattern rotate, Save To, Pattern restart, Live Edit and many more. A must have)
Of course you can still load the original or other third party fimware via USB"