I have the Pluto/Kuiper belt explorer printed (mostly).
The first print is missing the middle ring:
I ran out of ABS-like resin, so I continued printing in Siraya Build, which is a strong, tappable resin. It's also smokey clear:
The middle ring is re-printing right now. This copy has issues, so I taped it in place. The dust is sanding dust. The legs are round styrene tubes - the landing pads and other bits are printed, but they're small and delicate.
I designed both ships in sections, for easier painting and also to get better with 3D printing tolerances. Since the parts are designed to friction fit into each other, I added the gray upper section for a stretched or cargo explorer:
To get a sense of scale, here's a closeup of the two 1/350 scale astronauts at the top, from a long stalled build:
Here are Leif-like engines:
The metallic sheen is pretty cool. I may just leave the engine mostly clear and light it internally.
Back to the original design goal - getting to 500AU in a month would be too close to fantasy... let's make it 10A AU/month. Don't want to make the trip a vacation.
The Mars lander also had one section print poorly, so I'm reprinting it as well.