This is a project I've wanted to do for a long time. Build the Romulan Science Vessel from the Star Trek Next Gen episode "The Next Phase".
The actual Studio model of this ship was a re-dress of the Romulan Scout SHip from the episode "The Defector". The scout ship was intended to be a little larger than a federation runabout, where as the Science Vessel according to the script was about half the length of the enterprise, placing it at around 300m.
What I decided to do was use Federation Models 1:537 scale Scout Vessel Kit and modify it to represent a 1/400 scale science vessel. The federation models ship is about 6" long when built, however with the modification made to the kit my Science vessel comes to about 8", 1" shy of what it's "supposed" to be. But then again there never were any written specs on it that I have. So it's good enough for me.
The main changes made were as follows: The original cockpit was sawed off and replaced with a new nose cone made from sheet styrene and some Warhammer Battlefleet Gothic bits. the rear wing areas were filled in in some spots to more accurately match the studio model. The sides of the neck area were fleshed out with styrene shapes and a rear fin was made form styrene bits and a Warhammer 40k flying base sawed in half and glued together. It worked out more perfectly than I could have hoped for.
Next on the to do list. Finish making custom decals for all the "greeble" areas on the top and bottom of the wings as well as the rear wings and paint the sucker.