This is a bent Boss FZ-2. It sounds semi-close to stock when the toggle is in the middle position (and the sound is basically cut off when in the up or down position). The knobs don't work quite correctly. The gain boost is heavily distorted because I have increased the gain on that setting quite a bit. The Fuzz 2 setting is a very mid-scooped sound. Fuzz 1 is like a less bright, less distorted version of the gain boost channel. So, not that interesting when running a guitar through it.
However, in a feedback loop, which is what the sound clip is of, this thing get's quite crazy. Lots of pulses, squeals and clicks. The up and down position of the three-way toggle are very similar in sound, but flipping it quickly from up to down gives a cool glitching effect. I was going to make the third position engage completely different sound, but I decided not to considering most circuit-bent devices I've seen aren't wired to do that. All of the knobs work and alter the sound except for the level knob which is always up. In a loop, the pedal works on and off, but doesn't do much when off.