this should be enough to get a preliminary schematic going. With my vintage fender, this pedal did not sing as i had hoped. Overall, i thought it was a solid versatile pedal, but not superb everywhere.
from hc forum
skreddy --the Screw Driver and Lunar Module are derivations/enhancements of the FuzzFace circuit. That's how they're the same. From there, they go in two different directions. The Screw Driver has a mosfet input stage, which emphasizes the cleaner side of things and makes it get along with whatever you put in front of it. The Lunar Module is made from all 3 of the same type of oldschool silicon transistors (BC109C), and it's gritty even at its cleanest setting. But at its fuzziest, it does resemble a "muffy" old FuzzFace. Only it's a lot beefier sounding, IMO. Silicon fuzzfaces tend to be a bit on the thin and raspy side, so I made the Lunar Module really fat and smooth sounding (but still with a cutting midrange).