That's my custom fuzz, made by a friend. It's a Green Russian Muff into an Op-Amp Muff, but the Op-Amp side has a blend control. I run the Russian side on pretty low gain, which boosts into the Op-Amp side, which is totally dimed, but only mixed in at about 50%. Gives me a super saturated and heavy but also really articulate tone that I like a lot. It also gets EQ'd by one of the Zoias; primarily 1K for mids and more definition.