Storm manufactures the balls. The covers have different names from the Storm covers, not sure if any would be the same formulation???. All of the covers seem to be stronger than advertised - meaning I don't believe they can make a weak cover.
The Planet line, IMHO, is the best value in Bowling Balls.
Venus, Neptune and Saturn are outstanding values, you can't go wrong. (Sure Grip Cover)
In fact, the Horizons/Mystic mid line (Ultimate Grip Cover) - is tremendous for symmetric type and the Top Shelf Epic Line has one of the strongest asymmetrical weight blocks/coverstock produced (Ultimate Vision Cover).
Every ball has a purpose; something for everyone, in other words they don't just
throw a bunch of regurgitated releases on the market - they are well thought out and leading edge.
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SeriousKeglers.com Recognizing, Sharing; Learning - One Frame at a Time; Saving "Bowling as a Sport"Edited on 8/1/2007 3:11 AM