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Since you are a "former mechanic with car and motorcycle drag racing background", then you'll understand it from this angle...
When I'm done with all of my parts replacements-shocks, ball joints, etc, and go in for an alignment that's gonna cost me $50-$90-I'm not gonna have the hassle and expense the labor charge involved in changing the OEM bushings to meet the alignment specs that I want for the vehicle to track straight. With the adjustable pieces ALREADY installed, I avoid labor charges for work I could have done myself when I had it apart. This saves time. Time is money, and labor is expensive-even moreso when you could have changed the parts yourself when you had it apart.
JL
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What I am saying is that after you put all those parts in it should track well without special adjusters.