Center Cutting is all about the center:
Meaning accuracy is the name of the game.
So you have to know where the center is.
To be able to control your approach.
You need to be able to stop .005 from the center and be able to cross the center by .010
(on the hand dial or with a dial indicator)
If your wheel isn’t perfect (sharp corner) the center won’t be (where the wheel stops it leaves a shape) if the wheel corner is round it will leave a protrusion (tit) in the center