I was having the same problem with the Pyro at 1500...too strong of a reaction, lots of taps, even through the nose leaving some "big uglies" on occasion. I took it back to 1000 grit with a light polish and its a different ball...a much tamer, more "controlable" reaction.
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That which doesn't kill you will only make you stronger, that which doesn't make you stronger is a waste of time!