As one who had and liked a Crane derailleur on a PX-10 I have been following this discussion of early Dura Ace with some interest. Racers seemed to embrace at least the aero brake levers of the Shimano AX grouppo rather quickly. How does this tie into the Dura Ace line, was it a competitor and was it of similar quality? I sure liked the AX levers I had on a vintage bike recently. It was the Chris Pauly that Larry Black has now.
Tom Sanders
Lansing, MI