Tenpinspro,
My thumbhole isn't too large (actually I keep it quite snug because of my propensity to squeeze). It's the same size as the thumbholes in my other equipment. I have an oval thumbhole drilled slightly larger to accommodate a Magic Carpet and 2 pieces of tape, because my thumb size fluctuates with the time of day, and I bowl in the morning in two of my leagues, when it's at its largest. One of the posters wrote that the grips could end up causing too much reverse pitch, and I think that's the case. My thumbnail doesn't bruise using my other equipment.
I even thought that maybe the thumbhole had too much bevel, but it actually has slightly less bevel than my Deuce. The ball feels great until I get into my backswing, where I can actually feel pressure on the left corner of my thumb. The bruising covers the entire thumbnail, even though I feel the pressure on only one part.
Debbie
