Well my stuff is definitely smaller. My edge to edge/cut to cut is 4 3/16 middle and 4 1/4 ring. I use a 3/4 in middle and 11/16 in ring. My thumb in that ball is a super beveled 57/64 oval with 3 cuts at 45 degrees. However, I have not put my new slug in that ball, so I will open it up as much as needed for you to throw. Right now I only work on Thurdsays from 1-9, but I am down there a lot. The span will be short and thumb won't be perfect, but I think I should be able to make it work for you if you want. Let me know.
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Greg Townsend
Best Bowling Pro Shop, Inc.
Lindenwood University Bowling