Brian, you don't HAVE to put an expression pedal in the Footswitch/Expression input...

As it's name implies, it can receive either continuous OR switched pedals. Start/stop is one of its' options if you put a switch in there.

Look up p.55 of the manual...

It is also quite easy to go to that page on the fly and retask the F/S to do something else, but its' function is only stored in the UPS, NOT the UPG.

Hope this helps.