sorry to keep harping on this but like, my training area is in basically a large four story office building with no exterior skin, which is FULLY ENCLOSED inside the shell of the factory, with the roof structure easily twenty or thirty feet above it. And there are MANY other buildings like this inside the megastructure. The planes look so small out on the floor. It took me thirty minutes to walk to the safety eyeglass office and I never even went NEAR the exterior walls!