07-28-2015, 12:13 PM
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#4 (permalink)
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Enthusiast Member
Join Date: Nov 2009
Location: SF, CA
Posts: 339
Drives: 17 C7 Z06 M7
Rep Power: 66
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I use an Automatic:
http://www.amazon.com/gp/aw/d/B00UZ0...2BL&ref=plSrch
It has a good app and works with LapTimer as well.
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