Discussion on BC7

It is often the case just describe a dream as if we can do easily without desperate effort that we cannot realize actually as I have been so till the other day. I could not imagine what kind of drive feel and steering reaction should be obtained under Zero Thrust condition, because I didn't have any experience on unknown situation that never happens in extremely lowest probability less than 3/1,000.
Let's say it like this, "Matching and duplication of the car's core & the center of the human 6th sense."
Long desired dream has come true the other day, as long as over 40 years period of time. I have come to know the different world driving the same car as before. And my sense to perceive the discrepancy of thrust angle even at 6,6 seconds, though the direction of it could not tell clearly.
Now I feel like that it is no worthy to drive any other passenger's car than my BC7 Legacy LSi that had been adjusted firmly on wheel alignment in Zero Thrust condition. Then how have I been before thrust adjusted BC7? How had I been getting along with cars that had been keeping for more than 40 years? Once the way is opened to establish the "Zero Thrust" condition, I would apply this principle to all the car I'm keeping now and the same procedure would be performed on future automobile I would purchase in future.

Driving this morning BC7, I feel lack of self independent self stability in BC7 SUBARU Legacy LSi US model while straight running and this is written after some adequate measurement and adjustment in precise technology, so, the phenomena should not caused by poor condition of the axle constructive geometry and of discrepancy in wheel alignment at all. In order to obtain the stability supported by caster trail, the fundamental it's value must be increased in number, but the measure had been performed by moving the frontal main bar anteriorly 5mm extension already forming 2,585mm length wheel bases on both side, still now feel it's unstable bad taste while straight running, then as for motility that is the two side of the same coin in the relationship, not so much, how come?  The reduction of frontal caster angle could be imagined before modification this time from lower height Imprezza GDB to BD5 RS with longer suspension springs. More compliance could obtain comfort ride but lost caster angle leading to unstable straight running. This is the reason we don't see first generation SUBARU Legacy model very seldom and almost of them had been in the trash?
Though this kind of compromising and difficult works should be done by some adequate professional factory engineers for new model designing, I am about to solve this problem to establish stability while straight running. More tossing and rolling period of time might be required to know the fact and to correct the error?  The knuckle part replacement into later model's one for later Legacy BH is one of a choice for next strategy?