[milobender]

I certainly could build a pedal board... "o) I never have...

I would suspect it has something to do with one or more of your effects though. I think someone previously suggested just using the board as a power supply... +1 on that. Then just plug your OBEL send side directly into one effect at a time, and the out to your return of course, and see if you can isolate the culprit/culprits...