And the ship is now a single unit, more or less. I built the structure that goes in the center of the saucer. Obviously, both that and the saucer itself are thicker than on John's Drawing. But, you have to take a bit of creative license when doing things off of a single sketch. Indeed, they did so when they built Intrepid, it's not exactly like the design. For one thing, both ships have really thin saucers. Neither one is a deck thick at its edge, as many Trek saucers are. Some are two decks thick, but all are at least one deck thick at the edge. I thickened the whole saucer and gave it a more rounded design to fit better with other ships of the time.
So, here's the ship as it stands. I included a render that's close to the same view as the sketch, to give an idea of how it compares. Obviously, as I already stated, there are some slight differences. But, overall, I'm happy with how it's progressing.