I drilled my Theory at the World Series of Bowling. The pin is really tall up above the bridge about 2 inches, the mass bias is just above the thumb. This ball is the earliest Roto Grip ball I have ever drilled, the closest comparison I can think of is the original Cell. It clears the front of the lane and and really picks up the mid-lane. The biggest difference between this ball and the original Cell is the continuation, this ball is much more continuous then the original Cell. Another home run from Roto Grip!


David O'Sullivan