alignment tool camber, caster

For camber I use a level drilled for threaded stock for the measurement, from there I calc with MS excel. It's something like 2mm difference on a 17 inch wheel.
All i know is that the 245/45/17's in the front track all over the road when set to anything more than about -.25°
Toe is pretty simple in concept but hard to measure accurately since 1/16th is a really small measurement when trying to use a tape measure and string. Thus I use calipers, measure 10 times then set, measure another 10 times to check.
I've used toe plates and boards and rods but personally I think the string method is something I've been able to repeat with some success.
Biggest problem I have is that no one around here will give me a lifetime alignment and only 2 shops have even agreed to align it.