I have always had the impression that Storm has skid/flip balls. I know it all depends on drilling, surface and delivery, but most that I have seen are skid/flip.
But for medium I would go with the Shift, medium-heavy Attitude Shift. Both balls would work well for both conditions as long as they are drilled correctly.
These are just my thoughts...
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Thanks in advance for all comments...
T.J.
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