I had my Mutant Cell Pearl drilled 4-1/2 x 4. The pin is 1" over the ring finger and 1/2" to the right, the cg is 1-1/2" below the ring finger and the mass bias is 1/2" right of the thumb hole, no weight hole.
I am very pleased with the reaction it gives me. The pearl finish gets through the heads easily. The colorful shell lets you see the roll and spin. The midlane reaction is one of the best I've seen, it is very consistent and strong without any jerk and the backend is continuous.
I get all the recovery, back end and entry angle I need. I find it excellent for medium to medium/heavy oil conditions. Its an aggresive ball, but the good thing is its not an early hooker, it saves a lot for the back end.
All of you who saw Wes Malott the season before last with his Cell Pearl, get ready for more of the same plus a little more. This is the strong ball in my arsenal and a perfect compliment to my Mutant Cell with the control drill.