Megamav, if the CG is correctly marked ont he ball in the picture, you may have to worry about too much finger weight. After drilling the gripping holes, you will have a bunch of side weight. Where the hole is marked for now, you'll take out roughly equal side and equal thumb weight(add = finger weight).
You will probably have to remove 1 1/2 - 2oz. of side weight. With the hole in the poace you've marked, you will add roughly the same finger weight. You probably have 3/4 thumb to start before the hole.
I would move the hole up an inch to 1 1/2" from where you have it marked and also move it to the right an inch, so as not to remove as much top weight. It's best to end with a 3/2 ratio top to side for the best leverage weight reactiion. Good lulck. =:^D
