Just finished building the SWAH kit. It’s my 4th time building a pedal and it mostly seems to have worked. However, when the pedal is turned off I get a massive hum from my amp and almost no guitar sound. Also, when I even slightly touch the power switch on the amp, it makes a super loud whine. As far as I can tell the actual effect of the pedal works, so I’m not sure it’s an issue with the circuit board wiring but maybe with the power supply or jacks? I’ll attach pictures here. If anyone has any advice it would be much appreciated.