[sdiy] PIAI MIDI/CV question

[charlie lamm]

Mine seems to work...but...there is only one tweak for V/Oct., and the
closest I can get it, it loses about .007V/octave.  Not a big deal until
you get over 5 octaves or so, but then I figure I'd be able to start
hearing it.

Does anyone know if one can mod the thing to make it more accurate?  Or
should I just adjust my VCO's to accommodate the PAIA's idiosyncracies?