I made a support for the Optoma HD 65 and took the design and templates to a locksmith, in a day it ended.
Although I peskanje and paint in white to the finish.
For me he has a cost differential, but he told me that some charge $ 20 to manufacture one.
I already did in the measures that I needed and it was perfect.
I caught this idea of the spring and butterfly, I found some images from the Internet media DIY. The advantage is that I can control the inclination of the projector even the support being fixed.
It was quite strong. I believe that supports some 17,637 Lbs.
Look at the photos: