Flywheel surfaced - is there a thickness concern?

I just had the stock flywheel resurfaced. It wasnt in bad shape, but it had surface rusted where the clutch disk was. So now it is all new and pretty (both side).

The question I have, and I havent been able to to find the answer... do I need to worry about the thickness of the flywheel? So they probably took off 0.010" or 0.020" (I forgot to ask). I dont know if it had been surfaced previously. Is there a minimum thickness? Do I need to try to compensate for the loss in thickness somehow?