About the "soft" bending:
I found an editor where you can set the wave to the "wrong" number and... NOTHING happens.
Bummer. Apparently it can be done by dumping a sysex patch, manually editing the wave number with a HEX editir and dumping it back....jaaaaaa well didn't get around to doing that yet.
I haven't tried circuit bending it yet, because... I really don't want to break it. It's my master keyboard, a really specialy hybrid digital/analogue synth. I think a friend of mine has a ESQ-1 with a failed keyboard... That might be a contender (trigger it from MIDI, circuit bend it). There is a website where they even have spare parts and stuff...
As for the sounds being in EPROMs that should be OK, the drumulator I bent has EPROMs, they don't mind some bending. I think EPROMs can be erased with ultrviolet light only?
Shit... writing about it I really want to do it... it would be a first on the planet I think
If it CAN be done it would be awesome, the engine is 8-bit digital but the filters are analogue