v-mid circuit issues

Well, I've transported the McGrath Mini down to San Diego, where I'm continuing the testing and burn-in process.  Also, I hope to make some playing videos, because for guitars I have not only my Squier Mini-Strat for the single-coil sounds, but also my lovely Carvin DC-200K, a humbucker guitar with Gibson scale length, i.e., about the closest approximation to a Les Paul that I'm likely to get any time soon (actually the Carvin is much better than a Les Paul IMO).

Anyway.  In the testing arena, I continue to be pleased with how much the 10pF "degenerator" caps have improved stability.  It is still possible to get some pretty nasty self-oscillation out of her by turning up all the gains and maxing the mid and treble in the M-section, but it's at least less likely to happen at "reasonable" settings.  I still have some more shielding work to do, so maybe this will help.

But the main outstanding problem I have noticed is that the v-mid EQ doesn't seem to be working right.  In the boost position, the frequency knob seems to work and shifts the boost through mids to low treble as it's rotated.  But the level pot doesn't seem to be wired right, or else there's another issue with the circuit.  Rotating level CCW, which should lead to a scoop or band-stop effect, instead seems to fade out all audio regardless of frequency, as if it's connected to ground on that end instead of the out-of-phase audio signal.  So, this certainly needs to be fixed before I can ship this unit.  Stay tuned...