I've never had problems flattening out balls either, though I prefer the 16 over the 17.
This is a stroking mechanics issue anyway, nothing to do with the string. Just use less of an upward racquet path and extend out through the ball more, or turn your hand over more with a lower finish instead of up and over the shoulder.
Last edited by Torres : 10-21-2012 at 12:18 PM.
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