I tried to build a space shuttle to dismantle my old space station piece by piece, felt the orange tank was a waste of money and fuel an thought "eh, I'll just make an SSTO" And so I did. The pics are from the maiden flight of the Leviathan I, as you can see it lacks RCS thrusters. The purpose of this test flight was to see how much oxidizer could be left home after a KSC landing from a 100km stable orbit; it went pretty good, I ended up saving around 550 units of it.