So lately I've been installing (redecorated) emergency blast doors along the main fore-aft corridors:

They will be closable via a central location (the CIC):

Each one has a local override lever (red) in a "hidden" alcove next to it (the alcoves are hidden, but there are visible levers (orange) for revealing the alcove from either side of the door):

I also added something I can't believe none of us thought of before:

Computer cores!
They stretch 3 decks high (including the inbetween maintenance decks), and have internal redstoning to make the lights blink and stuff (ideal for when the server needs more lag).


Finally, here's some screenshots of nothing. Literally. Lots of nothing. These are the primary empty areas in the Fenris. A few will be filled beyond what they are now with some cross-corridors or whatnot, but in general, they're all needing to be filled with rooms. Many will have crew quarters, especially the spaces next to the external hull, but there's a bunch of large empty areas in the centerline of the ship, too.
Going from front to rear...
This is the area directly behind the crew lounge at the front of the ship, near the top hull (looking starboard):

This is below the area of the previous screenshot, overlooking the roof of the officer's lounge (looking aft):

This is from the cross-corridor seen in the distance in the previous screenshot, showing the area at the bottom of the forward "neck" (looking aft):

This is the lower forward part of the central hull, as seen from the cross-corridor in the background of the previous screenshot. The hull "ribs" in the bottom-right of the image still need to be filled in (looking aft and downwards):

A view of the starboard side of the forward "neck" (looking forward):

The area in front of the primary CIC and above the subspace drive core; the upper-front part of the central hull (looking aft-starboard):

The deck directly above the primary CIC, in the central hull (looking aft-port):

The area directly aft of the dropshafts, in the upper-rear part of the central hull (looking down and to starboard):

The area around the subspace drive core, in the upper part of the central hull (looking forward and to starboard):

The lower-half of the rear "neck", between the computer cores and engineering (looking starboard):

The deck below the subspace drive core, in the lower half of the central hull (looking forward and to starboard):

The bottom deck of the central hull (looking forward and to starboard):

The entire insides of the bottom "fin" which the missile launcher is connected to (looking downwards):

The lower port side of the engineering hull, above the arboretum (looking aft):

The bottom of the engineering hull, between the arboretum on the left and the rear of the engineering hull in the center-right (looking rear and to starboard):

The upper port side of the engineering hull and the area above engineering (looking rearwards and to starboard):

The entire starboard side of the engineering hull (looking aft):

As you can see, there's
plenty of space left to fill up. I could use some help from anyone in creative mode... you don't even have to be creative (as in "artistic"), as a good portion of the work that needs to be done involves fleshing out corridors or copying completed sections from port to starboard or vice versa.
If anyone not in creative mode wished to help as well, I'll speak to Muraqaz about getting you creative mode.
I typically have time to work on things at between 10pm and 4am GMT (4pm-10pm EST I think), so if you can help out during that time frame, it would be ideal.