Rollout vs ET

I always get in shallow bracket racing on a full tree. Just barely popping on the bottom bulb.
The reason is because that is the only spot that is repeatable, you know exactly where the car is that way. Any place else you dont( at least in a door car)
I try to get as deep as i can on a pro tree, to react quicker..
Less distance to break the beam.
That all said, in all my years of racing, never seen more than a couple or three difference.
Its only 8 inches, it cant be more than that, otherwise you have changed something