[Corley]

This is a good method IF you have the same tire sizes all around, AND you have no front wheel run-out. Actually, you can just use your eyeballs and site across the front tires outer edge to the rear tires edge, and you want the line of site to be about 1/4 of an inch outside the rear tire. Again, with the same limitations as above. If you are paying $100 for just toe in check/adjustment you are getting ripped royally since it is such a trivial adjustment. However, A good alignment shop can also verify that your axle is not bent, camber/caster is correct, your king pins are tight, etc. Now, with all that, $100 is reasonable.

Jmho