Small update. I'm still working on the nacelles, I have the windows in the lower part of the nacelle, and got the docking port area etched out. I also routered out the area where the warp grills will go. Those will be one piece that's solid instead of like the Ertl kit. The nose of the nacelle will be a seperate one piece part cast in clear.
I used my plotter with a CAD file to cut thin styrene in multiple passes for the pylon trench detail. I'll use the same technique for other surface details on the hull like the lifeboat hatches, transporter emitters and other various details.
REL- You know about the word "UGLY" worked into the hull paneling right? Bill George didn't like Probert's design, so he had some fun while detailing it.