OK, the Markbass Littlemark II's effects loop is configured as parallel. I want to run it in series (serial) for use with my compressor. This is done by setting a jumper. In it's current position, it is parallel. I can turn off the amp, move the jumper, and it will be serial. It would be easy enough to add a toggle switch, but what about a blend pot? My questions are: o With a switch, must the power be off when switching? o Is a blend pot feasible? o Would Markbass have a problem with this with regards to the warranty? o Is this a stupid idea? Thanks all!