This one was really just trying to figure out how the doors worked, and where exactly the spikes in the hallway should be placed.  The design includes a circular etching on the closed door but I’ve been leaning towards having the door be unmarked so as to make it more difficult for attackers to actually find it.  I did also finalize a design for the reception area, off in the corner there – the area marked storage is actually the emergency door opening mechanism.