MOTM

Dave is right--the 1v/8va is a VCO control and won't help you with tuning
per se.

I've thought about getting a cheapie tuner and mounting it onto an MOTM
panel for tuning. Or even a frequency counter since they build them into
VOMs cheap these days.

Carlos' Moog used to have, I believe, a reference oscillator. Basically a
panel with a jack that put 440 out. I guess you would have a crystal-based
fixed-pitch oscillator in there or something.