Finally a few updates! Since the last pics, I totally rebuilt almost all of the saucer, to make the mesh neater. I had cut everything out with booleans to get the shapes right, but that makes a mess out of everything.
The main parts of the saucer are done, so I'll move on to the nacelles next, I think. I also tweaked the secondary hull too, so it matches what we see in the movie better.
More updates later.