Nice work thus far StarSlayer!
I have to agree with Chief1983 though in regards to the chin armament: personally, I'd make it protrude more and allow it to be more omnidirectional. The lower hull portion that meets the back of it right now just seems too large, as it's already well established that the turrets we've seen in the films sit pretty much on their own and are only grounded at the base.
The windows of the C&C seem a tad off. When I study that portion, I keep having visions of a sloped top angling upwards from the forward windows. The top viewports would be seated on a slope, so I guess you could say that the top of the bridge's cylinder would be softened a bit by the sloped portion above the forward windows. I hope this make sense.
I don't know how "canonical" or not it would be to make such an alteration, but as you've pointed out yourself numerous times, there seems to be no real consensus as to what the back end of this thing looks like, so if they're not worried about it, I wouldn't be. In my opinion, most of the EU stuff is easy to eclipse design wise, so if you can make it look better (and I have no doubts that this is a feat you can easily achieve), just do so.
