Mine's going to be built with an SRAM Dual Drive, so a 3 speed hub with a 7 speed cassette - I really want both the top and bottom end - so that should obviate the sort of problems you had. I'll probably only remove items that have to go, though. I'm undecided as to whether to build this with a folding or non-folding 20; I'm having trouble imagining why I'd need to fold it. It's hardly likely to become my multi-mode commuter! Essentially, I just like the idea of building a 20 that's as fast as a road bike (or as close as it can be, given the weight!) for the sheer bloody minded fun of it.