Caster and Powerflex Bushings
I recently had my car aligned at BMW after getting new tires and replacing my fcabs with powerflex bushings. The XI powerflex bushings are offset. BMW told me that my car's caster would not be able to be within spec because of the offset bushings. They also said that because of the ofset bushings and out of spec caster, it is pulling slightly right. Admittedly, I am not an expert in alignment, but can't for the life of me figure out how off center bushings would casue the caster to be out of spec.