Error correction

Now I just imagined the way of thrust adjustment in a wheel adjustment procedure, though the thrust angle was so adjusted to establish a critical zero degree by cut and try by adjusting rear wheel toe direction keeping desired total toe-in angle value, there are some impasse actually.
However hard I might make effort on the thrust angle adjustment, the integrity especially measured  putting the standard on frontal trust direction when being driven on the flat and straight road.

Hence, wanna I  adjust rear total toe direction putting the standard on upper point as an experiment.
If it goes well, very actual establishment of critical wheel adjustment would be performed, because all the errors in the dimension that cannot be recognized in the ordinal scaling manner, including the difference between the frictional resistance in the axle gears.
As a next step, I'll proceed to this direction from now.