When you replace your clutch you can mill the flywheel on any other normal car.....how much can it bve smoother out on a rx7 and how much weight reduction can i expect..?

also when i put in a new clutch can i do it liek i ahve in all other cars i ahve worked on??...or do i have to worry abotu the eccentric shaft falling out of place of bearing or anythign like that(i remembered someone telling me when i did the racingbeat pulleys to be careful and jam the clkutch in while doing the procedure)