More accurate panning? Decimals - not just integers

I would like the ability to make more accurate pan adjustments. For example: I would like to be able to pan to L2.53, instead of just L2. This is mainly for calibration issues with external equipment - more accurate panning will allow me more accurate calibration, whereas right now, I can never quite get stereo balances quite as accurate as I might like.

Thanks!
-Todd