When I first did the alignment on my car I used the TCI specs. They are not right and had some scary bump steer encounters. Now instead of 1/32" toe in, it's now 3/32's. The caster was 1.5* now it's ~3.5* with the camber at their spec. Voila - it now handles very nicely. Will I experience some additional tire wear by not using the TCI spec - maybe, so what, but at least the car handles very nicely now.