I am trying to make a physical model of these surfaces. If I offset generally in Rhino, it creates a gap inside. Is there a way to make a seamless surface with a thickness with a grasshopper? any advise would be helpful!
3d model scaled.3dm (576.4 KB)
3d model scaled_M.3dm (1.6 MB)
You should first get used to create your model near the origin. While it was not extreme here, it adds some imprecision that could prevent such a small and precise model to be made.
Talking about imprecision, there’s some inconsistencies in the surfaces that prevent a clean offset that result of all 4 surfaces to intersect at one point. I made a patch there, it’s about 1 x 0.5 mm.
You’ll see in the file that the steps taken are mostly manual work. I would be surprised if any CAD software could make this automatically, you would get this kind of result: 
this may help with some ideas on how to go forward-
mesh offsets are fairly flexible, you can then always quadremesh>to subd>tonurbs and get a inner surface.
some ideas here may help too.
This is very helpful thank you for walking me through!
