Some notes on the parts:
I basically just scavenged an old Technology will save us Synth Kit I had lying around. For the schematic I just went to the interwebs and printed the first shematic I found of the APC. Every (!) part has another value than in the schematic. Nevermind, it makes noise ;)
Clean and pleasant design. Will you post a video? I'd love listen to a little bit of tinkering with the trimpots ;-)