The Slave Quarters looks awesome! This new tower looks promising as well. As for ideas, hmmm, you could use some wooden skewers or plastic rod to make a few antenea in the top of the ball. Would also be cool to see some communications terminals at the top and bottom. You could add some machenery greeblies on the side if you have some bits that would work. Good luck and can't wait to see how this developes.
I would like to sit you and Barry in the same room with the same material and stage a new reality show: Diorama Wars!