First one is awesome, I may have to rip off your idea and do something similar with WZ bits, kind of half-way between a battlecruiser and a true SFB style Mars, I like the idea.
Second one, I never really liked that secondary hull, I mean why do you need a rear deflector? What is the ship gonna be flying backwards through asteroid fields or something? LOL The only benefit to that hull I could ever see is that at least shuttles wont get shot down as they slow down to land, kinda like Me262s were only hunted by the allies when they returned to their airbase cause it was the only time they weren't flying too fast for the allied planes.
P.S. I could whip up a couple of registries for ya if you have blanks, I've not used P81's stuff for a while so I don't think I have the blanks anymore.