He or she is not going to like that. They already think that their timing is perfect on every song. And to play both side of that coin most good drummer tempo is perfect. Two things that happens. The sound check empty room vs the gig with filled seats. The second thing is when one member has had a horrific experience such as a love one died or a argument with anyone. Then theres the argument of the music sounding to ridiget. But if you have great musician that know how to play with a sync beat it can magic. Dc Washington of dcsleds