I am totally aware of both interfaces. The crank I bought was one of their "non series" components. The tech docs say to use a BB-ES25 which is Octalink v2. I can snag one from JensonUSA for 16 bucks. My main concern right now is the 46mm chainline I will be getting with using a shorter spindle, the 45mm recommended for the FD, and the 135mm rear spacing of the frame.