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Old 02-04-2013, 07:44 AM   #61
Tight Lines
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Join Date: Jan 2013
Location: Sparkill, NY
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Check out this link I posted.

http://tt.tennis-warehouse.com/showt...=1#post7190514

All you need is a good camera for someone to record your serve to find out how many frames it took from ball hitting to ball landing, and then plug the number of frames into the chart I provided above.

Harry
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