I'm planning to set up my steel rando bike with a 44/26 or 42/26 chainset. I'd prefer an indexing front derailleur, but it's not a requirement. Seat tube is 28.6 mm, so I need a conventional clamp on or I can get a bracket to simulate a braze-on fitting. But what will it take to shift this well? I'm using DT friction now, but will probably change to a brifter of some sort (drop bar) in the future.