I have arrived at my current fit through extensive reading and experimentation, and I think by now I have developed a pretty reliable sense of what works best for me. I am a bit suspicious of a "one formula fits all" appraoch to fitting. A professional fitting can get you a good starting point, but you still may need to make a few small adjustments to get things just right, so why not save your money?
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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