@Bob - Thanks
As to the strength (or size) of the beams I haven't built the structure out too much beyond what has been seen. The "aztec" pattern is more "striped" to me and you can see in earlier wireframes where I've laid the groundwork to put that in as I continue to texture it.
I'm right now playing with the starboard side area to put in an elevator to see how that looks and fits.
Edit: As to the decals, from the screenshots, only one is visible and that is the one at the refueling station. I'm sure there are others as I've seen some on the backstage pics, but since they were not visible or noticeable in the aired episodes they're not going to be high priority for me to place in.