Yes they are
You can get a Boxster aligned for the track or for max mileage on your rears via even tire wear. Both within Porsche specs. So do you want someone doing it and settling for within spec? Or do you go find someone who knows the car and the effect the possibilities have on handing and tire wear.
I had best luck with someone who set up P-cars for racing. Such a person knows the theory and the practice and how to apply it all to your specific suspension. That was 14 k miles ago and my rears are wearing perfectly evenly. I figure I have 4k miles to go before they have to be replaced.
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