I'm not sure I understand your question, but I think you were asking if the other gear is Steiner-Parker, too. It is all Steiner-Parker design. You can see at this web site, "user.xmission.com/~dingebre/Synthasystem.html" that I have re-released all the modules as Printer Circuit Boards ready to be built into Steiner-Parker Synthasystem modules.
In this video, I am feeding a sawtooth waveform from a Steiner VCO into the filter and adjusting the cutoff and resonance. I didn't use a VCA.