First, confirm the cg location and top weight on a dodo scale. If it is correct, you're going to end up with around 1 1/2 - 2 oz of positive side weight. For where you want the balance hole, yes, drill the finger holes 3/4 - 1" extra deep. Before drilling the balance hole, weigh it and take it out to the lanes and throw it to see what the reaction is. Then use the balance hole location to tweak the reaction as well as make the ball legal. -- JohnP