Tracks can change a bit. I was out of bowling for a while, about 2 years. My track went from 4 7/8 over and 7/8" up to 4 1/2 x 0. It might had changed a bit more since I had another layoff of a year and a half. I don't seem to be tracking as high, however the track is pretty much equidistant from my finger and thumb holes. I need to have it checked again.
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