Help with turning project into an stl. file

My project won’t completley export into an stl. file. Only a few surfaces end up in the export. I don’t know if it is just that it is not correctly set up. Mini.3dm (7.5 MB)

Hi, I tried exporting wiith windows version and this is what I get,
which part is it that when you is missing?
Perhaps you can upload the stl file or screen capture.

AustinSTL.stl (4.0 MB)

I can’t upload the stl file but it pretty much ended up the same as your export (missing surfaces).

this is what I got after offsetting surfaces. and then seperating in mesh mixer.
you should give symvol for rhino a trymini2.stl (75.2 KB)

loaded two models here https://we.tl/h6K7aMobef