Sometimes you just get that magic thumb that feels better than all the others. Get rid of this ball fast!!! Then, you will not have this problem. LOL, kidding!
I did reslug a customer's ball once that had the same problem, we got rid of the "perfect" ball.
You might try a thumb mold, pro shops can make a mold of the perfect thumb and then make you molded thumb grips, then all your thumbs will be the same. You could try Turbo Switch Grip also, but it won't have the "magic" thumb, but they will all be the same.
--------------------
Mike Austin's Precision Pro Shop
Houston, TX
Drilling and Tech Advice BirdDogbowling.com
Check out bowlingballauctions.com !!!
A bowling alternative to Ebay, now open !!!
Driller to many "Stars" and Tony Melendez too!
"So Many Balls, only ONE drill press!!"