I haven't played around with it that much yet because I have a couple of more veros in the works....man this is FUN
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It's quite a loud and bassy circuit, sounds quite like a ragged buzzy fuzz face with the neck pickup. Flip Q2 around and you get a lower gain fuzz face sound. Yes, it's quite an interesting circuit for sure, maybe tweak some values here and there, try some different transistors...and figure out what Q1 and Q2 does.