Green Russian Big Muff Fuzz : Black keys all day

This is a centerpiece of my board, even though it is the cheapest pedal on it. I wish to upgrade it someday to the original green russian fuzz, but until that happens this is a solid substitude

I am trying to recreate the black keys sound, and i have maybe not really a correct guess, but a cool sounding one - i use big muff as my stock overdrive. I really like their sound in live in crystall ballroom, for example the song thickfreakness - dan has a very heavy fuzz at the beginning and then he switches to lower gain sound which has a lot of low end and very bright mids. I do that low gain sound with big muff. It doesn’t fall apart when you play both low strings and high strings. I am 80% sure that is not what he is doing, but it sounds cool)

Tone knob is also a fuzz/ gain knob here