Brenton_Davy
900Global bowler
Like you can't cut ovals and you can't check legal weights without a scale. But there are mathematical ways to figure out balance hole placement. When I'm drilling a ball in my shop that is going to require a balance hole, I know where I'm going to place the hole and how big and deep it's going to be long before I check it on the scale. Most of the time the scale is just a formality to double check my work. It just takes practice.
When I'm drilling for a customer, I try to keep all of my specs within 1/32" of my desired specification, but I would have to guess that 90% of my customers wouldn't notice 1/16" of difference. I designed the bridge plates with that in mind. You can always get within 1/16" of your desired pitches with this device, usually closer. Offsets start at 1/8" and go up to 3/4" in 1/8" increments. In order to hit all combinations of pitches exactly I would have to make 4 or 5 more bridge plates. Since most people can't feel 1/16", I felt that the 6 current plates would be enough. The remaining 10% of the bowlers probably wouldn't want to use this device unless I decide to make more plates. The pitches that are available have been computed mathematically, machined into the plates, and checked with digital pitch gauges and they are extremely accurrate.
I'm surprised that you are still using drill bits to cut your ovals if you're as fussy as you say. I use an end mill to cut ovals--much cleaner.
I have some serious issues with some of the above.
Bolded in Red:
Have you not heard of balls with misplaced CG's? So many balls have them,. yet you assume every ball is stamped properly. Sorry, but I have been in the Pro Shop industry for many years, and I have seen CG's mistamped by up to 4 inches! That you don't weigh the ball up prior to drilling leaves you open to some embarrassing errors.
Bolded in Blue:
1/32" is a pretty large margin you are allowing yourself. I have customers that can identify 1/64" differential between balls. Means I HAVE TO BE ACCURATE!. Sounds like you are "dumbing down" the measuring, drilling and fitting skills of the pro shop operator. The ability to create consistency of fit and feel between balls is something most mid to elite level bowlers appreciate. Unfortunately, I also get a lot of bowlers trying to save a few bucks by playing the price game. They often get stung in the end and I suspect the same would happen in this situation.
Create an adjustable, guaranteed accurate version of this product and you might be on to something.