Harry,

I work at the a car factory and we can 4 wheel align a car in under 45
seconds with our ultrasonic alignment equipment. We have found the
ultrasonic system is more reliable than a laser system in high humidity and
heat environments such as a non air conditioned assembly plant. The laser
wavelength tends to become distorted in high heat humidity conditions. Which
causes the cameras to have difficulty reading the tire location properly.

"Harry Krause" wrote in message
...
I went with the Michelins, for the price quoted me on the phone, which
included mounting, balancing, disposing of old tires, sales tax
and...hehehe...an alignment check. I was amazed at the combo
computer/laser alignment machine.

As I mentioned, I finally got to see the damned air pressure indicators
that set the light off on my dash. One of the mechanics said he broke one
on a customer's car once, and it $200+ to replace.