Thanks for responding, Jim.
First off, you can only post images directly if you're a paying customer. I'm not, so I upload to an image hosting service (uDrop) and then use an embed code to get it to show up here. It's a little clunky but it works.
Second, I had only posted one image. I was referring to parts that were not in my capture, "offscreen to the left." Sorry I was confusing.
I've captured a larger area with some annotation below.
First, I was expecting to see engineering at A. I then realized that you had moved it to B, and provided redundancy, which is a great solution to several problems.
Second, I had thought that C was the structures we see through the grating in the engineering set. Now I see that that area in the set is represented at D.
So, two remaining questions. First, you have wider structures at C, in the center, and then narrower structures to the outside. Why are they different?
Second, where is (are) the emergency manual monitor?