This one just traced over on FSB. It's essentially a modified Wampler Plexidrive with an added bass control. Several of the capacitor values are well educated guesses and the resistor just before the Master control hasn't been listed, but I'd start with 10-15k and adjust to taste. Also unless you're really sure any through-hole J201s you have on hand are in spec/authentic, I'd suggest using MMBFJ201s, which are the SMD version which are still in production and much easier to get in spec than the discontinued through-hole version. SMD to through-hole conversion boards here.
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