Tri-grip layout information

Question
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.

Answer
Gary,
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.