In its day, the Mutant was one, if not the biggest, hooking early rolling ball out there. Big diff between the Mutant and Ice(assuming the Ebonite one). Both the original Rule and Xception will fit between them, just a matter of what you want the ball to do. The Goo on the Rule is more aggressive than the Goo LS on the Xception. The Rule will roll sooner, while the X will have LOTS of backend. Even a polished Rule will be more aggressive than the Xception, and have less backend.
Let us know,
Clint
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Clint Daley-Owner
Lets Go Bowling Daley
Salem, Ohio 44460
TRACK ADVISORY PRO SHOP STAFF