So I made one that was very secure and ran cords along the ceiling. In my not-so-humble opinion, it's much more safe than having the projector on a cart or table where kids run the risk of knocking it over, tripping over the cords, or looking directly into the lamp. In order for anything to come loose, the bolts would need to be undone. No earthquake is capable of doing that. And the projector is strapped to the shelf by military grade zip ties. And the two blocks that raise the rear of the projector are glued to the shelf. Each of the attachment fittings are rated at 10 pounds EACH. There are four of them. The whole setup does not weigh 15 pounds. The power cord runs to the rear to a power strip which it does not share with any component that would be on at the same time as the projector. The other cables run overhead and down along a wall. The cords don't look pretty, but they are secure and OFF THE FLOOR. Well, yesterday I was told I could not have my projector mounted on the ceiling. So now, if I want to use my projector at all, I either need to have it dead center in the middle of my room, among all the kids where they can touch it, look into the lamp, pull on the cords, and bump into it. Or I need to rearrange my entire classroom, including everything on the walls and all of the book cases. OK, so I get it about my home-built mount. Though I spent 20 years in the military restraining cargo inside of airplanes, I'm not certified in any engineering or construction trade. I know that the shelf is perfectly safe and secure, but I have no real way to document or prove it. Second, is the issue of cords. She doesn't seem to like the cords hung from the ceiling. Says they are a fire hazard. Based on what? Cords are cords whether they run on the CARPET or near the ceiling. And these cords are clipped to the ceiling tracks and zip tied together. She did say she'd order me a commercial ceiling mount like this one. That doesn't solve the matter of the cords - which isn't really a problem in my opinion. I'm afraid she will change her mind if she thinks we need an electrician to wire all the cords into the walls. Is there anything I am missing here?