Got this baby in very bad nonworking condition. Had to replace the processor board (battery leakage) with a cloned version and to source 12 new SSM chips.

It got also MIDI plus an input for using the internal chorus FX now.
After cleaning its looking brand new.
A nice 5k pot replacing R116 near IC31 will increase the unison detune!
http://synthhacker.blogspot.de/2013/04/polysix-adding-detune.html

Thx so much to Curetronic.com and Malte Rogacki for helping with the reanimation:)