I deliberately didn't mention the waveshaping section as I wanted to keep to tracing the most direct line until things were a bit clearer.
If you've got some 3080s that could be very helpful
Yes, I didn't want to confuse things, but probably have. Sorry!
My 3080s are the 8-pin DIPs, which I'm guessing are the ones in the Jen - rather than the cans. I'd be happy to send a couple out if VJ's look to be at fault.