I looked at your profile you must have a damn good phyiscal game.
that being said I would go 4" pin and then it is up to you where you go with the cg.
the brunswick method is pretty good,just put the cg to give you about 3/4 oz. static side.
use the ball and see how you like it,if it is not flaring up enough you can then fine tune it with a balance hole.
with an rpm rate of 300 you probably will love the ball without the hole but it depends on the amount oil you bowl on.
your ball driller knows your game,we on the computer do not use him/her thats your best plan of attack.
