Ok Im having a problem with my the left side of my thumb nail when i bowl. When i release the ball i feel the tip of my thumb rubbing on the inside of the thumb whole. My span is 4 13/16 and4 7/8s I currently am using 1/4 left and 1/4 rev pitch. What can i change to solve this problem ??
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PennState 2006-2010
Dynothane
Threshold 4 x 4
Inferno pin under 4x5