my god, I seriously have SO MUCH to do :S small update anyway, I'm pretty happy with this area and kinda close to calling it finished.
floor needs a bit more work, possibly more trim around the grate. Ceiling in top right of the shot needs to be removed and replaced with a drop-down vertical vent space. Mostly everything else I'm happy to call final I guess. The 2 rooms I want to get done before tomorrow evening are the 'outside' room on the right of the second image, and the corner air shaft room which is going to be directly behind the camera in both shots.

Room on the right here leads to 'the surface' hence the strong lighting
