Kingpin,
Keep in mind that on drier lane conditions, not medium-light, but light or less oil, a pearl resin or a highly polished mild solid resin will skid longer than even a pearlized urethane ball. The pearl urethane will hook less once it grabs the lane than most resin balls - that is its strength, in today's environment: a controlled hook.
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"We get old too fast, and too late, smart."