Re travel tubes, shafts, etc. I for one wouldn't mind seeing such a thing passing through part of the room. I've toured enough Navy ships to know that you jam the equipment in wherever it fits.
re the ladder. You put them exactly where I imagined them!
I'll work with Dennis to see what we can do about getting some greenscreen footage of engineers to put farther back in the space. I have my own simple greenscreen here so if I had a costume or two I could shoot this stuff myself. Hey, Dennis, ship me back the mesh engineering jumpsuit and a Suarez suit!