anyone use this Dragy tool for 1/4 mile stuff? gps based

How do they do the top speed? Most tracks use two gates on the big end, so you get an average speed that always ends up a little lower than the instantaneous speed you get with GPS. Other than that the Dragy should be pretty spot on. It seems to me it wouldn't be that hard to code it to simulate the trap, but I don't know if anyone has ever done it like that.

-Geoff
 
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