The microcontroller is seated properly. I get 4.97 at pin 23. And I get 0 to 4.98 on the middle lug of the Depth pot.
So, I probably don’t have enough solder somewhere, or an errant blob somewhere! Since there is this apparent crosstalk between the Depth knob and the green Rate LED, can you give me a good starting point to look for solder errors? Or, can I use the DMM to track down the cause of the intermittent signal?