Drill the ball with the pin 2 inches from axis and balance the ball with a weight hole around 5 1/2 to 6 inches from the centre of the grip through the CG. and change your cover to 1000 wet sand. i've seen this used on a wall shot by a house proshop owner on storm staff with a low track and high rev rate, worked wonderfully for him. It was on a very wet dry block shot.
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I am Canadian Dude!