Sorry, Luker doesn't have it right.
Cyclotine hit it on the nose with Triomphe and 980 (990 had a restyled pulley cage), respectively.
Neither work well with corncobs unless the derailer hanger stop sits particularly forward (for some reason, Campag designed both parallelograms to sit perfectly vertical - bad idea), and they don't work too well with wide-range either.
-Kurt
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