Finished this dio last night. It's a mix of the Bandai Turbolaser and Death Star tile from the A-wing set and a B-wing from the Fantasy Flight Games line.
Most of this was focusing on the painting (and not stressing), and I didn't do much building at all.
Thanks for looking!
And here's a few shots of the black-basing technique.
Apply a black primer
Airbrush mottled squiggles to the surface in white
Airbrush a super-thin blending coat in the base color you want
Finally, add some highlights and/or brush-painted details.
http://www.rebelscale.com/models/star-wars-dioramas/bandai-turbolaser-tower/