After too much fiddling with the C10 cap trying out different configurations for a mids knob (ya, I should have socketed) I think I've burned out the ring for the hole on the PCB. It's the right leg that connects with R18 and the 3rd lug of the tone pot.
Is it possible to just stretch the leg over to R18 and drill out the offending hole?
You can scrape some of the green off of the trace that goes to your hole and make a solder bridge from the component lead and the trace.