Well, if his track goes between the finger and thumb holes, you shouldn't call him a spinner, which indicates a very low outside track.
With his low speed, an Ultra Sonic sounds perfect, and, yes, you should use the full-roller drillings, since it also seems like he has a full roller's track!
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Bowling: Wish I could help me as much as I seem to help others ...
Life ... is what you make of it. No, really!