Hey nebowler73,
Definitely agree with my Tag Team partner here. The 2 balls have different reaction shapes. The SZ tends to be a little early with some continuation while the Power Machine goes longer with a stronger backend. If drilled properly, and some lite surface adjustments, both balls can be used efficiently.
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Rick Leong - Ten Pins Pro Shop
Track Intl. - Amateur/Pro Shop Staff
Vise Inserts Staff
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*El Presidente of the Track Legion