When you work so closely with something for so long, subtle changes are easier to detect, and some weren't so subtle, not to mention there were several of them. I added 1/4 reverse on top of what I already had to my fingers, went from 1/8 left and 5/8 right in each respective finger to 3/8ths left and right. Span shortened 1/16, thumb went 1/8 forward and 1/16 left. The aggregate change was actually pretty substantial.
Drilled both balls and went out and threw several games last night. The biggest change in the fit is the fingers, now my hand is completely relaxed while being able to keep my finger pads in full contact with the front sides of the holes. I'm catching the ball a lot better at the bottom now. Before I'd lose one every so often which would cause me to over-grip the next one. Now that my thumb socket stays in position easier, I don't have the instinct to grab at the bottom to keep it from coming off too quick because I'm trying to dig in with the fingers to make sure I hit it at the bottom.
I have absolutely no reason to say something is good when it actually isn't, or say it matters when it doesn't. I've been paying really close attention to my fit for several months now, making notes about how it's coming off, how consistent I am, trying to track release patterns, etc. It wasn't like I just decided to make some changes, read the book, and ended up at these numbers. I don't think I'd have ever recommended putting 5/8 reverse in each finger for anyone let alone myself before, but that's where my hand told me they needed to be.
I also threw the balls with the new fit against a ball with the old fit. Like I said though, the old fit was still pretty darn good, I just would mis-hit it at the bottom sometimes and have a tendency to grab at the bottom occasionally. With the angle change seating my hand more properly, my consistency was up quite a bit. I'm the world's most boring 230 average bowler, most of the time it's a couple strikes, spare, couple more strikes, spare, couple more strikes, spare, sheet. Yesterday it was more of the same with the old fit, but when throwing balls with the new fit, the consistency was better, I threw 8, 9, 10 in a row several times, not just getting them to fall but being the result of consistently better shots. I experienced no change in speed, rev rate, tilt, or angle of rotation, but I didn't expect to. I just expected more consistency, comfort, and stamina, and that's what I got. I hope to get some videos Saturday or Sunday.