My guess would be that Storm has tested it at different surfaces and determined that the masses will fall in love with it at box finish of 2000 abr. Storm probably also knows that the more experienced players will not hesitate to see what it does at lower grits or with polish.
Remember the Special came out of the box at 2000 abr and if you take it down to 500, it will hook on the longest of patterns.
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Mike Craig-Columbus, OH