[Bobcat]

Merv ... sounds like you`re having too much fun playing with the scales !! I found the same thing on turn in and overall handling . My ride heights w/o driver are slightly different than with driver , but the guy that set my cross weights only does it with the driver`s weight in the car .... also sets the toe in/out , camber and caster with the weight in the car .
Like you , I`m still learning ... and found a good article on Longacre`s site about squaring a car . The point they make is that you want the rear suspension to be exactly square to the front suspension , not some point on the chassis .
Took me a ling time , but I got within 1/64 " ... can`t wait for another track weekend , but winter is coming on now .

Bob
PS ... just got a new Mac and haven`t figured out how to attach a link yet , sorry .