here's a pedal i built up for a buddy of mine the other day. he plays bass in the local chicago trio Hobo and Boxcar, and wanted something that he could use for bass as well as guitar. i built him up a circuit that i came up with based on the Fuzz Face/Wooly Mammoth model, that shines when it comes to double duty fuzz action. it's basically a tweaked fuzz face with russian GT309 transistors (a new fave of mine), that has the fuzz factory/wooly mammoth adjustable NFB gate control, an input gain pot, a max gain trimmer, and a LPF/switchable HPF adjustable tone control, similar to the Big Muff, that allows for guitar or bass functions. the mid shift switch allows anything from fat scooped bass, a dirty overdrive, or mid-heavy motorhead style grind. for guitar, it's capable of anything from monster thick doom tones to mosquito sixties style fuzz. topped off with some sweet vintage knobs, it's a great switch-hitter.