[sdiy] VC distortion?

[gerald stevens]

Hello,

I have been thinking about using vactrols to add voltage control to a
distortion pedal.  Looks like my grunge pedal requires pots and not
variable resistors.  I imagine you could build a voltage controlled pot
using two vactrols, one with an inverted level sent to an LED - has anyone
done this?  I have also seen tech notes on using digital pots in pairs to
create voltage controlled pots, but most digital pots are surface mount
these days, and too much caffeine precludes the use of such tiny components.

Has anyone taken the PAIA quadrafuzz and modified it for modular synth use?
Know of any other voltage controlled distortion circuits online? 

best,