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Originally Posted by rwthomas1
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A friend of mine used to race a Datsun 2000 roadster. He swapped several national records with Group 44, if that name means anything. He had made a very similar setup using a couple of military surplus colimators. The principle is exactly the same as the Hitman setup. It worked quite well, we were able to do significant suspension development on that car. We made modifications to the camber curve and were able to tune most of the bump steer out of the original suspension. When he finally gave up the Datsun effort, he went to a Super Vee that looks sort of like the drawing in Hitman's "race car applications" page. Later, sprint cars, still being aligned with the same system.
The real key to making that work is in the adapters to your wheels. Any imperfection there would translate directly to toe-in error. Also, the farther away the targets are, the finer adjustment can be seen.
Straight on,