I'm NOT going to get into a pissing match but, When I bent the front end on my 77 F150 4WD, I took it to an alignment shop and they said it was in factory specs. I found a shop in Cottonwood with an old time alignment man who fixed it. He told me that it is not in "factory specs" when he finished, but, it would drive straight and would not wear tires. GUESS WHAT, he was exactly right. Drove better than it did from the factory, and NO ADVERSE tire wear. Want to guess where he set the camber? Straight up on the right and 1/2 degree positive on the left. Also had quite a number of big trucks aligned. Want to guess how they were set? And, I've been around long enough to know how to use basic tools to accomplish what I need to do. Want to come drive my Explorer which is showing no adverse tire wear? It could use a bit more toe-in, but I'm content to leave it alone. After 2 1/2 years with cheap Prime well tires. It amazes me the tire wear patterns. There are none. You all can read and do what you want, but I have had too much experience with high priced shops that don't know how to do anything but charge high prices, and do shoddy work. I'll keep using my tape measure and level.