Very nice work on the DRD.
I have the same kit. I bout it like 4 or 5 years ago, got to work on it, and then like everything else, set it aside and never got back to it, ot finish it.
I rebuilt the whole on the top left side. Drilled out the wholes for the eye stocks. (yeah, I know most of them were sold with those wholes alread drilled out, but Mine didn't.

) I also had to drill out the whole were the pincher arm goes. I also rebuilt the very inaccurate tear drop shaped panel on the left side. (the one you cut out.)
I want to build a door for that area on the rear right side, that is supposed to have a door over it.
I was pretty happy with my tear drop shaped pannel but after seeing yorus, I'm kind of wanting to cut mine out too.
I was going to leave the part were the rotating lights go alone, but after seeing yours, I really want to what you did. What did yo use to cut the disk out, and what is that thing you put under it. (It looks really cool)
On the very top of my list though, is to find an easy way to build up the area around the bottom. On the real DRDs, there are grooves a couple inches up the side, that go around the DRD, and go over the "Wings" on the sides. But on this verion, they just indinted the hole area between the groves. (I didn't say that very well, but hopefully someone understood that. LOL) Anyways, in my book, that is the most glaring problem with this kit, and I just wont be happy with my kit, until I find a way to fix it.
Other then the things I have listed here, I can live with the rest. Moya is a big ship, and if she makes here DRDs, it just stands to reason, that some may different from others. This one's difference in size and shape, just makes it unique. Though I know most fans, think this kit is only suited for a job at the bottom of the guano pit at the bottom of Pilots din. :lol
I'm really looking forward to seeing what you do on this build. It may even give me the boost I need to get mine done.