I just bought a pile of used bits incl a Mavic cassette which appears barely used but am unsure about how to stack the sprockets. They don't have the usual one wide spline tooth so quite obviously the 'shifting ramps' (which in Mavic's case is a series of teeth with a twisted profile) have to be set in some particular way relative to the adjoining sprocket. Searched the web without success & got a blank look at the LBS. How is it done ? Many thanks !