Originally posted by stevebfl
You are probably lucky to have accuracy within 1 degree per side. Real alignments need accuracy to at least a tenth of a degree. My machine gives repeatable readings to one hundredth of a degree.
A subsequent check of my alignment on a modern alignment machine showed that the actuals were within 0.1 degree of my measurements, which, from a practical standpoint is sufficient accuracy. A machine may measure to .01 degree, but no one is ever going to try to set a car to that level of accuracy.
I got tired of paying alignments shops who don't understand suspension geometry to do it their way instead of my way. Thus I started doing my own over 20 years ago. Even though the equipment is crude, if you have a flat surface such as a garage slab on a fairly modern house, you can get very good results.