Ok, here's the deal. Initially I created the side-view outline of the Fenris separately from the more accurate, top-down views. I thought the two views matched in size, but apparently I was wrong. I just went to the top roof of Fenris (y=128) to measure things, and it turns out that it was 2 blocks too narrow (side-to-side), and 5 blocks too short (front-to-back) - according to the top-down view files
(according to the side view it was fine). Frustrating.
Anyway, obviously the side view is not nearly as comprehensive as the top-down views, so I figured we'd best go according to them. To that end, I added the necessary blocks to the roof, and got it sized exactly as it should be, and then realized what I was getting into.
So.... qaz/rhx, could one of you slice the Fenris into quarters, nudge the port quarters 1 block to port, the starboard quarters 1 block to starboard, the front quarters 3 blocks forwards, and the rear quarters 2 blocks backwards? It'll be a lot simpler to fill in the missing gap in the center than move all the bulkheads. :-/
Also, I started replacing the engine section at the rear with glass - I'm thinking we can sandwich some lava (no pun intended) between vertical sheets of glass for the engine glows.
Finally, see attached for updated top-down files... the graphics are still the same, but the filenames include the y coordinate you see in F3 when you're standing on the level that file is for.
[attachment deleted by ninja]