The Optimum Axis Tilt and Axis Rotation is subject to conditions and equipment.
Even though Team USA targets 5deg and 45deg of rotation, that doesnt mean it is the best. there are a lot of other factors to be considered.
I know Jeff C visits this site quite often, I'm guessing he is not 5deg and 45 deg rotation, and he has one of the most potent games in the sport today. I dont want to answer for him but I thought he tracked a little bit lower.
Axis Tilt and axis rotation doesnt make the bowler great, repeating shots does.
--------------------
B.I.G. Don't pretend that it's not.