Nyle and I had another good discussion about power supplies and he reported the VCO, "is standing tall." He is very happy with it and has the output voltages about the same level. I've made what I hope are the last modifications so I can get some PCBs in production.
Nyle strongly suggested, and I agree with it and have done it on my MOTM and JH VCOs, to put the V/Oct trimmer on the panel or at least front panel accessible. I've used a Vishay-Spectrol adapter which lets you mount a 3/4 inch multiturn trimmer on a panel and the adjust it with a fine screwdriver or a trimmer adjusting tool. the make tuning the V/Oct so much easier. Nyle also suggested losing the "VAR VC" and making the third VC input be some defined fraction (like 1/2) of a volt /per octave. Or, the user could just have 3 matched v/oct inputs. To that end, I've modified the panel and the schematic/PCB to reflect this.
We also discussed power supplied, but no firm decisions were made. We mostly discussed the advantages of making his circuits run on +/- 12 instead of the +12 / -10 they use now. When we figure out what we're doing on that front, I'll post here.