We've done the "two timer" thing also. Works well and if you mark the "PCC timer" with tape, then everyone knows that's the one to use when the PCC guys show up.
Hopefully you'll have enough timers on hand to do this and seeing as how most shooters have a timer in their bag, it gets borrowed for the match from time to time.
Of course when you "borrow" one of the AMG timers, it works even better!
AD