Really, this was actually one of my issue when I looked into these things. yes, fitting spoke on a hub is not difficult but I always worried about straightness... fitting a front derailleur is "just" the case of fitting a static bracket and bolt a derailleur... very easy. if you have a "premium" spider crankset, just undo the 4 or 5 bolt and fit the new rings... if it s a budget, swap the crankset (wish requires specific tool) but, it is all simple plug and play.