I don't really know what you would call them but I've seen a couple advertised, you know they stick on your windshield and can give you 0-60mph, 1/4 mile times, lateral g's etc. Anyone have one or know anything about them? (brands, quality, etc) The nearest track to me is a 2 hour drive away so it would be nice to have something I could practice launches with. (just so long as it was accurate to within say 2 tenths)