Need some input from you experts:
I'm trying to get my measurements down; new bowler
I'm throwing a 15lb X Factor. Pin under bridge, cg kicked out about 1 1/2" to right of center grip, PAP is about 4 1/2" right of center grip.
I believe it's drilled with 1/8 reverse in the fingers (not sure about lateral), thumb is 1 1/8" offset to the left looking at ball (I believe this called right offset) with 1/4 forward pitch, and should be either a 1/4 or 1/8 right lateral (toward palm). Speed about 18mph, medium revs. Usually stand 25-27 on approach, across arrows at 12 out to 3 before coming back. (THS: Xmas tree pattern)
Now for the problem. My thumb seems to be coming out early. This is surprising considering the forward pitch. I'm a new bowler; a lot of it could be me. The thumb doesn't seem to be too big. I've put one piece of white tape on front, and currently have two pieces of black on back.
One problem may be my backswing. I don't open up my palm much; I try to keep my hand sorta cupped under the ball. I find I don't get back underneath the ball otherwise and lose a lot of revs. I also think my forward swing is faster than my backswing, like I'm trying to power the ball. I think I do it to stay under the ball. Some tell me this is to compensate for the ball not being drilled right so I don't drop it. The span seems ok to me, but maybe a smidge (I mean a smidge) too long. Not sure if that's a factor or not. The driller keeps asking me questions about if it feels right or is that the measurement you want. This is sooo frustrating. Number one there is a language barrier, but two, I keep telling him, "I have no idea what "right" feels like!!!! I'm a new bowler. It feels fine to me. You could change the measurement by 1/4" and it still feels fine. Which way should it be??? I want to get all my measurements worked out on this ball BEFORE I buy new equipment. Knowledge is rare in these parts. I need your help.