Originally Posted by audiovideoholic
Can someone tell me what mount this is and how it works?
This is actually a mount from Digital Projection. It uses a thicker 2" pipe instead of the normal 1 1/2". The silver piece in the picture, is an adapter to adapter down to the standard 1 1/2" pipe for the Sony.
I completely disagree with the comments that you shouldn't do it this way, or that it locks you in more permanently than a surfaced mounted device. That is not true.
If you notice in my pic, there is a white blank plate on the ceiling just behind the projector. That was where a 1 1/2" pipe was before, and where about 6 different projectors hung over the years. When I switched to the DP Highlite and then the 1000, both machines were bigger and the pipe had to be moved further out from the wall. I just put a blank plate over that hole.
If I had a mount surface-mounted to the ceiling, there would be probably 4 or so screw holes spread out over a much larger area, and far more difficult to deal with then one 1 1/2" hole.
I have attic access, so this was a no-brainer. All of the connections run right down the pipe, and the mount is way more stable because it sits on top of the trusses, and screws down from the top. So the entire weight of the projector and mount is resting on top of the truss, the screws just hold the mount from shifting around.
So if you have attic access, I wouldn't do it any other way. Its much easier to throw up one blank plate to cover one hole for the pipe, then trying to patch a ton of screw holes spread out over a larger area. And its just a super clean install.