have you tried something as simple as using bowlers tape directly on your thumb? new skin in my opinion isnt the best of stuff... i actually perfer superglue... also there is a product out call thumb saver... i think bowlingball.com carries it... not sure who makes it but you could do a search... with either of those you may have to open up your thumb hole some, but if it fixes the problem then it would be worth it... i would try it on 1 all and if it works go frm there....
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