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Old 02-26-2013, 06:44 AM   #11
Federerkblade
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Join Date: Dec 2009
Posts: 883
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I definitely think this device can benefit players on serve and groundstrokes and even better if you have a ball machine. hopefully yann can explain more
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Wilson Pro Open BLX 2012 modded to 335g lead at 10 and 9
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