Thanks very much guys! Glad you like it.
You even fixed something I never could get quite right in my sketches: The link between the sphere and the secondary hull. (Without 3D technology it's quite hard to imagine how a spherical object and a cigar-shaped thing come together.)
It's something I find difficult to imagine too. These days I'm a lot faster moving a design from 2D to 3D just so I can see how the all curves/shapes will intersect.
Needs more of a "Cage"/"Where No Man Has Gone Before"-type bridge.
Okay, here's a try at a "Cage"-type bridge. I did it fairly roughly, with the expectation that I wouldn't like it (since it looks awful on the Enterprise), but now I see it... it's growing on me. Add in a few modifications and I might just keep it.
Here's another small addition, the lower sensor dome: