I agree and therein lies the problem. I try to get my balls down to around 14.9 pounds because of a chronic hand injury. I accomplish this by drilling the fingers and thumb deep and putting in an x-hole. Ocassionally we get lucky and find a 15 or 15.1 pound ball and can avoid an x-hole, but the BW is 15.3. I also would like to keep the mb relatively close to the thumb which with the way the cg and pin are aligned on the bW means not kicking out the cg (equating to no static imbalance; an x-hole would result in negative weight which I do not want in the BW).
The other option is to place a very, very deep x-hole in and past the center of the ball (using a 12 inch drill bit) once past the center point positive weight returns. The problem with this approach is that you never know how it might affect the dynamics of the ball once you start drilling in and through the core/weight block. I've had this done on many, many balls and it's a very effective way to reduce a balls gross weight but the results as far as ball reaction is concerned are a bit of a crap shoot. Sometimes it enhances a balls dynamics by creating a large mass bias and other times it kills it.
My driller was a physics major, he'll figure something out. Any other ideas, guys?
