I have built several pedals, the last two have failed completely. I built a triple Nostalgia 70s version. It’s one of the best effects I’ve done. The last one double Nostalgia Dumble & Luna Fuzz. I can’t get to work. I have traced through continuity all seems good, then I tried a prove and the Dumble has no sound going through it at all. I was for a time able to get sound through the Luna Fuzz, I checked all the connections going through the double and selection switch. And the 3pdt’s all seem good. I’ve been several times reflowing the solders on the back. About ready to give up completely. Idk what to do other than, take it all apart and try something else. My troubleshooting isn’t the best, but this one has me stumped. This is the 2nd project in a row, I have to trash and start over.