Okaies.. current thoughts.. On the Klingon NuD-7, add a couple of 'support struts' below the connection of the pylons and the engineering hull. This will bulk it up a little and make it flow more without dramatically altering the overall form. (They would only show in the bow, really, like a smoothed pair of trusses on each side.) The SB, lower the ventral assembly down by about it's own length, and use some of the Reliant's parts (the shuttle-bays, etc) to make the lower assembly into something more pragmatic in function. Keep the upper largely as is, but add windows and 'habitation' details. The quadrants definately need 'bumps' like I mentioned before. I would consider adding an outward structure to each of the quadrants, to allow for tether docking. Make it match the gangway on the Enterprise in size and scale. Hope this helps.