Nicanor, You may get a quicker better response by asking this in the drilling forum. I don't know what kind of static weights are in the ball, but I doubt if a small weight hole is going to make a lot of difference. Just my opinion, it would take a hole along with a cover alteration to make a noticeable difference. Let the reader of your post know what type of reaction you are getting, & how you would like it altered. Earlier roll, longer with more snap, etc.
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Wayne
Hardcore FOS