Oooh, I had one of these, there were some excellent pad sounds and some truely pointless sounds as well. If it does ot have a manual programming will be a nightmare (Was hard enough WITH a manual).
As for the PSU, I adapted a universal PSU as a spare, it's the 2 outermost pins that are used in the 5 pin DIN, however with the SX16, it was a bigger PSU and used 4 if the pins on a DIN plug (I think there were +24V lines on there).
If you want to hear what it's like, have a look over at
http://mal7921.spaces.live.com and find the track MIST (Instrumental) on the right hand side, it has MS 800 scattered throughout the track.
Have to admit though, much as this module drove me mad, I'd have another to sit alongside my MS6.