I'm setting up one of my Raleigh Intl's with a TA Cyclotouriste crank, with rings of 50/40/30, with a likely rear 6-speed cluster of 14-28 and 126 rear spacing. Any advice on front and rear ders that will work with that set-up would be appreciated. I need a front der without a housing stop that will handle that triple range but which is narrow enough to clear the crank arm. I have a Campy Rally I've been using as a rear der, but wouldn't mind switching to something that shifts a little more precisely. I'll use non-indexed thumb or bar end shifters. I'm willing to use either period correct or modern derailleurs to get a set-up that will be dependable and trouble free for a long ride. Any sources for the appropriate derailleurs would also be helpful.