I was really concerned that the two part hull halves would be a problem fitting flush and holding together once joined, but it wasn't a big deal. The upper hull needed more scraping at the lapped joint to get a flush fit. The lower hull only needed a little work. The resulting joints are very strong. Note the raised detail along the hull edges are mismatched at the joint lines. This occurs on all four joints, but I'm leaving them be because I am a lazy butt.
Upper hull:
https://flic.kr/p/RjMrHP]
[/url]ISD-26 by N.T. Izumi, on Flickr
Lower hull:
https://flic.kr/p/RgjHQb]
[/url]ISD-27 by N.T. Izumi, on Flickr
I had a brain fart for the stand support structure, so I hastily started cutting sheet plastic and ended up with this:
https://flic.kr/p/R5uAGL]
[/url]ISD-21 by N.T. Izumi, on Flickr
It was made up as I went, so it was unnecessarily complicated and inefficient. A lot of the reinforcing would not have been needed if a really thick bottom plate was used. I used 0.040" plate, but 0.080" would have been better.
The model will be supported by a single tubular pylon inserted into the space occupied by the reactor dome, so the dome had a mounting tube and rare earth magnets installed to allow it to be easily removed. A loop of tape is needed to pluck out the dome from the hull, but attention was paid to arrive at the correct amount of Force 
to extract it.
https://flic.kr/p/R89uoK]
[/url]ISD-25 by N.T. Izumi, on Flickr
The tube going to the middle main engine provides a means to mount the model in a vertical attitude, for painting first and possibly photography with the reactor dome in place later. Again magnets are used to hold the engine in place. The magnets attached to the support tube were intentionally set a little farther forward than the matching magnets inside the short mounting tube, so the the engine gets "sucked" into place and stays there.
https://flic.kr/p/QJryff]
[/url]ISD-22 by N.T. Izumi, on Flickr
Workmanship is not very pretty, but no one will see any of this once the hull is closed.