Since I tend to run smallish outer chainrings (50, 49, 47, even 45) chainrings on my road bikes, I have to be aware of the cage shape. My biggest mismatch is the UO-8, which has a Shimano Titlist front derailleur and 45-42 half-step chainrings. The cage looks a bit odd, sticking way out behind the chainrings, but the combination works quite well, as long as I don't mind trimming the cage position whenever I shift by more than one cog in back.
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"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069