Yes, i plan to stock up on spares before i leave the US (cheaper than buying locally, and i should have a good amount of riding to come up with any changes i want)
Have ridden all over new zealand with the higher gearing (and a road double, which was way too high for my knees in the south island). Plus im not above walking if i have to.
Have built this bike up right from a bare frame, right from brazing the cantilever posts, to hand building the wheelset. So swapping anything out isnt a big problem

All up my bike and everything im taking (i.e. if i were standing there nude and had no fuel, food, or water - now theres a good story) comes in at just under 30kg or about 66lbs. Approx half my weight (and nearly a perfect split between bike and gear)