So I've had a crack at a 100% reusable space plane. Mind, with a little intake abuse which I'll likely modify in the future by putting intakes under the wings on separate fueslages rather than clumped together. Using it at the moment to construct a space station in LKO section by section. It can carry AND land with a 4.5 tonne payload. No requirement to transfer fuel between tanks or anything like that. Simple take off and go. Very easy to control. Normally landing the craft by gliding now over controlled flight.