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the best I can describe is that my fork has two separate lower links instead of the "unified" version. after a big hit it will knock the legs out of parallel causing the fork to track funny. There is a tech sheet explaining how to properly re-align the fork, but I am under the impression that this is common and the "link" was Girvin's solution.http://idriders.com/proflex/resources/v1_v2_al_alignment.pdf