Here's a cool dirt box from Creepy Fingers. It's essentially a modified Fuzz Face with an output buffer. The Bottom control pans between 2 input capacitors and offers a wide range of tones throughout the sweep. Originals used 2SC859 transistors which can be hard to find and have a BCE pinout, but I've also laid it out for CBE pinout transistors. For Q1-2 try 2N5089s and for Q3 try an MPSA18, but socket and experiment.
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