Can a full roller be 3/4 with the help with grip changes?
Also, I don't get the coke bottle test. I had this done a few times before but I didn't have the coconuts to question the guys back then. The position of the thumb holding the coke can/bottle/wrist is to find 0 +/- lat pitches on a bowler - what I don't get is...the thumb position holding the object isn't the same when holding a ball. Or is that thumb position suppose to be kinda where the thumb is at release?
My thumb points positive when holding an object. I did at one point have my thumb go under and I couldn't get the ball out clean. It added more axis rotation, but also irritated the side of my thumb. Then the thumb went back to zero and it was ok again. Now I'm at 1/8 away which is much much better with the 8th forward that I have.....anyway, why the coke bottle test?