The geniuses (or genies?) over at runoffgroove developed this workalike of the old Big Muff. The circuit idea bases upon a CMOS and derives its name from the fractal approximation of Pi. Among the classic Big Muff sound this device is equipped with two more modes (flat and scoop) making this Muff really flexible and unique.
Have a look at the Acrylic glass between bottom plate and enclosure which is illuminated by a blue LED when engaged.
"Frankenstein! Frankenstein the legend, Frankenstein the indestructable! Ripped up, wiped out, battered, shatteres, creamed, and reamed ... a dancer on the brink of death ... Frankenstein, who lost a leg in '98, an arm in '99!"