Had the privileged of building a Gristleizer over the holiday. Was a part of the gift I sent out for this years ILF Secret Santa. I decided to put a twist on the typical design, and built it into a treadle enclosure...a re-purposed crybaby wah for the curious. Here's a little background info on the circuit.
It's hard to explain what all the circuit does, but tremolo/ringmod/broken amp/idk? Tons of control and options. Treadle controls speed, then depth, bias, & volume are on the right. The left has a vca/vcf toggle, and a rotary switch for the waveshape.