My advice don't touch these parameters. These are automatically done with special procedure of turret alignment. You can correct manually the parameters slightly, taking care about secure clamp position.
So, leave these parameters in piece.
As for turret indexing speed. I don't understand a reason. Everyone wants the turret to be indexed as fast as possible normally. No?
Check if your turret is not moving ( by angle ) when clamping and unclamping. The angle movement during clamp or/ and unclamp indicates the indexing needs update. And probably the turret must be re-alligned also.