Ok, this isn't totallt strange to me it's just been a while. I dug a
little deeper in my boxes of forgotten stuff and found circuit boards
with sockets, part of a practice logic circuit someone was learning on,
and some chips, one of which I recognize as an op amp, it's an LM 741C.
So I'll try it, or maybe one of the others, compare it to the
transistor unit i've already mocked up, and let you know which circuit
goes into the finished pedal.