I've been messing about with KSP for a couple weeks now, and I'm working on getting an all-up space program going. I've figured that the NERVA is the best exoatmospheric engine in terms of fuel efficiency, but I'm having trouble getting my stuff into orbit without it either falling apart or burning so much fuel on the ascent that by the time I'm up, all of the fuel I was planning to use for transfers ends up getting used for establishing orbit. I use asparagus staging, but I'm having a lot of difficulty getting clustering working without my lifters either flying apart in midair from floppiness and/or flipping all over the place because they're unbalanced in spite of what the CM and CT show in the VAB. I've tried using MechJeb, but it doesn't seem to handle asparagus staging - the discards seem to impact the rest of the rocket about 80% of the time, and the whole thing wobbles like a fnoodle in a hurricane. Are there any good tutorials out there for the current build that take the reaction wheels into account and might give some good pointers on design?