my first model, i made it several months ago.
i just made the animation today to show it's components.
it is a large rocket capable of interplanetary travel. the interior bay sections are large enough to fit an array of space shuttles, up to 12, for in-flight repairs or supply shipments. the outer shell of the front sections are 2-3 stories thick and are two counter-rotating artificial gravity platforms for the passengers comfort and convenience. in front of the hab sections and internal bay is a huge lander designed for controled entry to the surface of the target planet for colonization.
realistically, this would never leave the ground, would instantly lose structural strength the instant the engines are fired and would have no chance of returning back to Earth, but who cares about realism?