My second EHX Big Muff of the week and third this month! These must have an expiration date or something. Anyway, this was purchased online and when it arrived it (SURPRISE!) didn't work. It's battery connector had been "repaired" with scotch tape. Most of the pots were replacements that were incorrect values... also... It had been "wired" with hot glue. I'll let you go back and read that sentence again. Hot. Glue. On the wires. There should be a government agency that steps in when this happens and removes gear from harms way. I replaced all three damaged pots and mismatched knobs, and wired them up with good old fashioned solder. I also drilled through the case and installed a 9volt DC jack. The PCB board was intact, so it fired right up and sounds like a Muff should. Fuzzy!