I built that great model once, and there are some supports that someone made, but I had plans to print it out at 1/2 size on my next try.the big models keep sagging, and I am not sure how to stop this yet. some modelers have posted some supports for various trouble sag spots, I was thinking of a completely different idea of side supports on a base that was on the side, so that one side was up against the wall of the base. this would enable a very strong support system and better wiring for the lights.