Love the gears discussion, very helpful, just the kind of debate I hoped to provoke. Alot of the rest seems to be quite straight forward. Having only ridden triples, 2 different sizes (would require a trip to the shed to check numbers) and cruised past a load of people on the Furka in the summer. I liked the flexiblity of gear options it seem to give me. But will have to test out the alternatives.