Your drilling options are fairly limited with a 1" pin, if you are concered with having the ball weigh out legal. Your best option with that ball would likely be pin under, 5" or so from your axis. It might pay to look out for some of the "pro pin" Dimensions that Bowlingball.com has been selling on e-Bay, if you are set on some type of length drilling on a Dimension. Some have gone for under 80.00 including shipping.
Edited on 7/18/2009 6:48 AM