Bowling/Tri-grip layout information
Mr. Friedl: Good morning. I am interested in finding out as much as I can about the 'tri-grip' layout(s) originated by Mr. Bill Hall. If such information is 'private' or otherwise unavailable just so advise me. Thank you for your time. Sincerely, G. Cooper/Centralia, Washington p.s. I am not a pro shop operator/owner, just interested if layout/drilling information.
Unfortunately, Bill's system is licensed and can only be purchased by brick and mortar pro shop operators. Releasing details is not possible for the copy written material.
As I was beginning to utilize the system in my store, I wrote an article in Pro Shop Operator magazine. I explain the system and interviewed some Chicago area practioners, for pro shops. I recapped the story in my blog: http://thebowlingtree.blogspot.com/2013/09/bill-halls-tri-grip-bowling-ball.html
Thanks for the question. Hope this helps your understanding of Bill's concept.