Thanks P-K, always happy to contribute to one of you masterwork dioramas.
So, without getting too far into the weeds (like making spheres) there is some detailing that can be done on the cruise disk. The equipment boxes are straight forward constructions, but the fuel tanks are approximated by cylinders.
At this scale, the thrusters are just little boxes suggesting the orientation of the six engines (no tiny cones - use toothpick tips if you must).
And the whole thing:
Including the internal bits (skycrane and rover) would require building those models very small and folding the rover (very origami). You'd also have to cut out the center of the former disk and figure out how to make the parts open.
We'll see what Jon thinks ...
Yogi