Front Toe direction

I have been immersed in wheel alignment and suspension constructive geometry of the vehicles these days, SXE10 TOYOTA Altezza and air-cooled VW Super Beetle 11AD. According to the suggestion by our accounting clerk that the number of our keeping cars is too much, reduction of them are necessary condition to be required to keep our economic condition, elimination of wastes.

About the adjustment of so to speak wheel alignment, Thrust angle and the vector direction of front Total Toe direction should be the same theoretically, but actually they differ a little actually, probably the discrepancy must be caused by the error of camber values on 4 wheels, backlashes on supporting bearings, uneven weight balance and adjustment error in everywhere. Then which is the prior error to be relied on for adjustment, front toe direction or thrust value scaled on rear wheels? As my reliable opinion, the trust angle should be adjusted at the rear adjusting points based on front toe direction until it comes to front zero error. This is the key to establishing Zero Thrust condition  on the vehicle. My opinion like this might change if more sophisticated way would appear in future.