I drilled up a Dark Thunder Pearl last week. Mine is not tame by any means. I'm right handed and put the pin below the middle finger, and the cg is at about 430 in relation. Pin is 2-3". I needed a small weight hole, and the final specs wound up being 0 finger/thumb and 1/2 oz of side. Ball is very clean for me, and makes a strong move to the pocket on medium/heavy. With a bit less oil, I can just move in and still get the ball down the lane without a problem, but the ball really flips in the backend. A very strong ball for me on medium conditions. A real nice piece. Shot 865 my second time out with it. I really like this cover and core combination. After throwing the Dark Thunder solid, I was looking forward to the release of this piece.