Two balls, very similar. Both had their strengths and weaknesses.
Ball #1
* 1/8 reverse, 1/8 away. Cut-to-cut span of 4 1/8 (middle) and 4 1/4 (ring)
* Strengths: Slightly more revs, easier to tilt, easier to impart changes in hand positions, better carry.
* Weaknesses: Had to use more grip pressure, not as consistent in hitting my mark, harder to shoot right-side spares.
Ball #2
3/16 forward, 0 lateral. Cut-to-cut span of 4 1/16 (middle) and 4 1/8 (ring)
* Strengths: Much easier to hold the ball, easier to go up the back of the ball, easier to shoot extreme left- and right-side spares, more accurate, easier to project downlane.
* Weaknesses: Fewer revs, span felt strange (and too short), very difficult to tilt/loop the ball consistently, carry seemed to suffer.
---
In other words, a mixed bag. I'll probably keep playing around with things but I can tell it's going to take some trial and error. The next one I do, I won't shorten the span. That would tell me if I could drop-plug all my current stuff if I needed to, or whether I'd have to fully plug the thumb hole and move it up 1/16. I also need to know whether I should stop drilling the middle finger span shorter than the ring because it felt really strange.
One thing I can say is that I tested these balls side-by-side, switching back and forth and had no problem going from one pitch to the other. So if anyone out there is scared to do it for fear they're going to rip their thumbs off, I wouldn't worry.
The two best things about the forward-span ball were clearly comfort and the ability to get behind the ball. For playing up the boards, I found it tough to replicate the same shots with the same accuracy using the reverse-pitch ball.
But if I needed to tilt it big and go around it, it was practically impossible to do so with the forward pitch ball. Maybe that will just take some practice.
Jess
Edited on 5/28/2008 1:07 AM