What should have taken only a few minutes took a half hour because the screws that held the metal plate in place would not budge. I even broke the plastic handle off a small screwdriver. Resorted to the cordless drill, which needed about 10 minutes to charge up.
Once inside, the procedure was quick. I spotted C4 and bent it back and forth until one end broke free.
Got the pedal back together, plugged it in, hit the switch ... nothing. I had forgotten to put the battery back.
Once more — plugged it in, hit the switch ... nothing. Realized, after ignoring the urge to put the pedal through the wall, I had the guitar and amp cables switched.
By this point, so much time had passed since hearing the pedal in its stock form that I wasn't sure of any change. Was it all in my head? It *seems* more open now. There is still a slight volume drop, but nothing I can't work with. Must say I like the way this tremolo sounds. I don't know if it's clearer, I just always thought the pedal sounded somewhat muffled before. Good (really good) enough until I get the real thing on a DRRI.
Reiterating PigBoy's question — is there a need to remove the whole cap?