> Actually it works amazingly well, though I can't tell you why. I had my
> doubts as well, but the system appears to be accurate within a foot or so.
>
> I didn't do anything scientific to test this, just looked at the difference
> between laps when I know I was within a few inches of the apex cone and one
> where I was about a foot away. I could clearly see the difference.
Now that I think about it some more, this is pretty believable, if
done in a relatively short timeframe. The absolute accuracy won't
be good from weekend to weekend, but over the course of an hour,
it will probably work just fine.
Neat.
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