For a bowler who has issues with thumb swelling the grips sound like a great idea, one of the guys I bowl with is considering them just for that reason, instead of adding and taking out tape all the time he could setup a series of 2 or 3 different sizes to quickly switch between instead of screwing around with tape all night. I on the other hand have very little problem with swelling and when I add tape and get the fit where I like it I can leave it alone for weeks.
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