Built a pedal, sold it to some guy and drove like 40 miles to bring it to him, give him a year warranty. I then find out that the AC adapter jack that I wasn't able to test as I didn't have an adapter didn't work so I then proceed to go all the ****ing way back to pick it up and bring it home and fix it. I fix it, then I notice some popping when turning the pedal on. I email him asking if he noticed any as I didn't want to drive all the ****ing way back there to bring it back, just to find out I gotta go all the ****ing way out there to fix it again. He says he did, so I proceed to spend three ****ing days trying to figure out how to get rid of it. Turns out idk what the **** the deal is, so I take the pedal and his money back over to him and say if the pop is too bad I'll give him a refund. Get there and it's not too bad on his amp, everything's working fine. He's satisfied.
Then he said he wasn't really worried about the popping, just the AC jack.