1. I have noticed that the main engineering set for the original series was usually only seen from one side. Now if you take the design and mirror it you will get a much larger engineering section that I always thought fit nicer. You will also now have two of those big conduits, one for each nacelle which leaves room in the center for you to add a verticle warp core.
Of course, alternatively the "real" set might be mirrored about the longitudinal axis of the conduit thing. It all literally depends on where one draws the line.
