I've started with the two (identical) hinges that connect the hatch to the capsule.
They're surprisingly complicated! A six-link mechanism ensures that the sides of the hatch fully clear the capsule:
The hinge is definitely buildable at all at 1/4 scale and the mechanism moves surprisingly smoothly!
For reference, it's about 6cm tall when open. I've simplified the model a lot so that's it built up in layers instead of being true 3D geometry.
As you can see, the "arms" of some of the parts wind up a lot thinner than the ones on the actual hinge, and I don't think it would be practical to have them be built up of like 10 layers each. I'll definitely redesign this, but since it's clear that the hinge works at 1/4 scale, I'll come back to this after prototyping the other moving parts.