Hey, @Christian – Were you ever able to fix the issue you’re having? I’m having what appears to be the same issue you’re having. V3 build. Bypass, LED work…but circuit is engaged, Fuzz is sputtery and volume is right around unity gain at max… The bias knob does seem to affect the tone a bit, though I haven’t measured voltage, yet. I’m trying to see if perhaps I did the off board wiring incorrectly, or if I populated the board incorrectly as well. Transistors are low leakage, NKT 12 / 270x within the proper gain ranges.