> require five fuel transfers in orbit, a technology that has never been demonstrated SpaceX does transfers a lot more complicated than fuel (including human b

> require five fuel transfers in orbit, a technology that has never been demonstrated SpaceX does transfers a lot more complicated than fuel (including human beings) all the time and it's fine. > land a tall rocket vertically on lunar terrain is the real hurdle here, along with differences in gravity. Though lack of said gravity does make the landing part a lot easier.