Great stuff, guys. Seems to me if the gatehouse is always occupied that there could be a winch/rachet sort of thing to pull the portcullis up into the it - flip the rachet and the thing falls with some force. I think I could draw that sort of arrangement in if needed.

My biggest problem remains how to actually represent this thing with the roof off, but also showing the entrance area. I'm clueless on how to do that in a way that won't confuse the viewer.
M

Edit: Oh. And. I LOVE Legos! Best toy ever invented...