Thank you for the compliments.
The grid on top is staying. It took me a couple hours to make that grid, so it's definitely staying. (Those are individual square rods of plastic, glued into the cut outs in the roof section.) I plan to put some transparent plastic behind it once the painting is done. My inspiration for the roof was Blade Runner, where you see the blimp passing over the Bradbury Building, from the inside. I did consider making a peaked roof, but that would have been a project all by itself.