I made my own angry charlie, including PCB layout. Mostly using SMD components. It works well, however it does generate a fair amount of noise when engaged and was wondering if it's because of my layout or if this pedal does generate lots of noise due to the nature of the circuit. My PCB has 4 layers, all power paths are on the bottom layer, then ground plane, and all signal path on the top 2 layers, with minimal path crossing. All my capacitors are either film (through holes) or C0G class 1 if ceramic SMD to avoid microphonic effects of class 2 ceramic caps. The power filtering is on a separate PCB on the footswitch, also to avoid noise. So I am a bit puzzled in how I can minimize the noise to a more normal level. I was also careful in the integration to avoid ground loops and signal wires near power wires.