One of the more intricate parts was the blast door at the front of the tower. The internals are visible below:
The complete blast door below.
It's kind of difficult to see from this angle, but I've made another gap in the rear wall and will be adding a third walkway and bunker attached to the tower, for extra style.
That'll do it for this round of updates, be sure to stay tuned for future updates as this project progresses at an unprecedented pace, and be sure to listen to the Table Top Generals Podcast available on iTunes. The next episode will be a first look at the new Chaos codex.
Enjoy your game, guys,
-Jordan