Ok guys, first of all... I feel this is a ball that everyone needs in their bag. It may not be the right ball for just any league condition, but on something short and fresh, you wont beat the roll this ball gives ya. I have thrown two different layouts. One being pin above the middle finger, and the other being pin above ring and to the right. Neither balls needed a wieght hole.
What I did notice however, is that if you have any surface at all on them, they wont work as great. The cut off Core rolls very heavy, and doesnt rev up that easily so the more surface the less backend it has,etc. I actually even tried both of mine at high surfaces such as 4K Abralon, and still didnt like the reaction. I then added polish to both balls and they became great in some many ways. I have made enough money with my two Gemstones that I have with any other ball in my bag. I can however, say they wont work on oil though so dont try to bring them out at the wrong time. Even at the highest of grits being 4K, the ball seems to want to really roll true throughout the heads and then on the backend as well.
All in all, I am very very impressed with this piece. On the right condition, it gives you what no other bowler has on the lanes. I would give it a strong 9.5 and I have had quiet a few games on my Gemstones. Thanks for reading and feel confident in thinking this ball will work on drier conditions. John Davis
