Thanks for the info! Very helpful and good stuff to know.
I do have a broken 606 (dead CPU) and I just want to trigger the voices via MIDI. Which components would I need to remove from the voice circuits to achieve this? Would I just bypass the transistors on the trigger inputs? For example Q14 & Q15 in the bass drum circuit? I’m just trying to get an idea of how much tinkering I’ll need to do before I install a uniPulse.