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Old 10-25-2012, 02:03 PM   #18
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Join Date: Oct 2005
Posts: 33,653

Originally Posted by LeeD View Post
We can agree about trying to hit thru 2.5 tennis balls, I think.
Yes, that is the number that comes from calculations too. I think it was rounded up to 3 which also nicely matched the number of balls in a can, and then continued to be used as visual aid. However, the can should be somewhat flexible, like a plastic tube, so that it can arrange itself on a gentle curve.
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