Sorry all, I started a new job last week, which derailed my progress quite a bit. But I did have a little time for work on the pylons and some general mesh cleanup.
The nacelles and their part of the pylon, and the hinge, are separate pieces, with the remaining pylon built directly into the engineering hull. Hopefully this will allow me to easily rotate the nacelles for renders and animation, but I think it might make my texture bake a little janky. We'll see.