I'd concur with Big Bowling. The PG was much stronger than it was/is advertised to be. IMO - if your rev rate is 200+ and your speed is under 18mph at the foul line, this ball is too much for truly dry lanes. My first drill was 4.5x6, the second was 6x6 - still more of a ball for medium and up than for dry.
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Kill the back row (or maybe this should read "make your spares, dummy")