I had lots of problems getting this up and running after setting in attic for years.  Replaced quite a few bad components but working ok now.  One last problem.  When I turn up the saturation pot I start to hear cracking sounds on hard strumming.  The more I turn it up the more cracking I get but not louder.  It sounds like a voicecoil bottoming out but I don't think that is what it is.  Tried it on another external speaker and it does the same cracking.  One thing I'm not using any footpedal not sure if it is needed to turn on and off.  When the Sat pot is all the way down everything sounds fine.