I did make some progress on my model tonight though.
I started off by making a rough wireframe of the enclosure.
But the points didn't line up correctly because I was sloppy when I put the seat together in SketchUp. So I went back to the model of the chair and tightened everything up. Then I was able to get good, accurate lines.
So here it is, the first draft of the enclosure:
The one side panel is not shown because I still haven't decided how I want it to open. Right now it's between a canopy and a door. With my current design, I wouldn't be able to do a hinged canopy, but it might be possible to have one that slides straight back. But a door is looking more likely at this point. It would be cool to have a door that swung up instead of out, but it would be a difficult process to make it so that it wasn't hard to open while you were sitting in the pit. I'll probably do a rear-swinging suicide-type door like what I had on Moya. It's all still up in the air at this point.
In honor of Doctor Who coming back on the air tonight, I added a small, nerdy, touch to the model.
Yep, that's the TARDIS police telephone sign!
Love me some Doctor Who.