Another idea. If you are making lots of Star destroyers, make a crown of thorns with the spearhead of the ISDs being the spokes of a smaller battlestation.
I'm thingking about it, but i have no good solution at the moment. It should look like they are floating in space and not like they are pinned to a steel rod ;-)
I always loved that Rogue Concept Sketch from the first time i saw it in the Net. Used to have that Pic as my personal desktop background for quite some months