On the external footswitch, I use switch "A" to bypass, switch "B" for delay hold, and switch "C" for tap tempo.
As for the built-in switches, switch "A" selects preset 1, switch "B" selects preset 2, and switch "B" selects the bank.
Since the tap-tempo switch gets the most wear on my TimeFactor, my main concern was to not wear out any switches on the unit itself. And, it's awkward to switch between bank and preset modes while playing. I'd hate to be without my delay pedal just because of a worn-out switch. If the external switch wears out, I can get one for about $25 at most stores.
