If this video featured anyone other than Marshall Hollman, I'd say stay away for the simple reason that it is obviously very old. Because it is Marshall, much of the information is still relevant as he had, in my opinion, the first truly modern release. My only hesitation in recommending this video 100% comes from the fact that pre-modern bowling balls reacted so differently, as attested by the fact that Marshall himself told me that he only won one tournament using reactive resin. Modern balls effectively ended his career.
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