Wanted to turn this terrain piece into a diorama. https://www.thingiverse.com/thing:3156493
The base in my pictures slightly different because I hadn't saved a version without the hole for the switch I used. So I modeled a new one. The thin ring is to be glued to the terrain piece so that it stays on the base but can be easily opened.
The hinge is nowhere near being Fallout canon but it is 'functional' and fits into the space of the original terrain piece. It uses 1.75mm filament but may need to be drilled out a bit.
I will make a remix of the vault walls/floor with space to run LEDs in the future.
Figures used are from: