[OldG]

The soundcheck is what it says, to check the sound is at the right level with your chosen balance of performers coming through at your chosen level.

Matt, our lead guitarist, tends to check ours at gigs -he has a wireless setup for his strat that allows him to play out front with the audience if he wants to, which is ideal at soundcheck to run back to the desk to make fine adjustments.

Oli, the drummer, monitors through headphones (small in ear type) so to hear everyone,and not just drums - maybe a wireless in ear monitoring system would be the answer here? Although I am wondering why you don't just use an amp miked for your purposes....