I understand. That is very frustrating.
I was assuming since I didn’t hear from you for a while that re-flowing the solder joints worked…at least until now. Is that correct?
I know you’ve been putting pedals together for many years now, so I’m sure you know that these types of intermittent issues are always related to bad connections somewhere…that’s pretty much the only thing that can cause them. If you’ve already re-flowed all the solder joints and re-seat the microcontroller, the only thing I think that I could do is to look at your board…there may be something that I happen to notice. If you want me to do that, you can send me some detailed, in focus photos of both sides of your circuit board to info “at” zeppelindesignlabs “dot” com. I want to look at the solder joints, so try to focus on those. You should bend up the pots as much as possible so I can see under them. Hopefully, I can see something in the details of the photos that was easy to miss in real-life.
Once again, I’m really sorry for this annoyance. I know it is frustrating.
-Brach