Here’s another cool project for ya – Os Mutantes Fuzz (a.k.a Regulus VIII) !
Circuit developed in 70’s by Cesar Dias for Os Mutantes guitarist.
Very unique sounding circuit powered by two silicon NPN transistors. Only one knob – Volume and Filter switch to cut bass response frequency. There’s also silicon diode clipping section for even more distortion and compression.
And here is Deadpool – Os Mutantes fuzz with some mods by madbean.
Visit madbean’s project page for useful info here.