I've had one of these for years, and recently dug it out of storage to try and get it going. Looked like someone had tampered with it, so I got it back to the original schematic with help from photos and schematics from various web sites. I got it to work with a weak wah, so I replaced the 2 electrolytics and the inductor (with a red fasel). Still the same weak sound.. I guess I'm down to checking resistors etc. and maybe replacing the 2 transistors (Si MPS A09). I guess this wah is similar to the wah part of a Colorsound Fuzz-Wah (the circuit looks identical). Any hints on getting this unit back in service. The shotgunning approach isn't paying off so far.. Thanks!