On January 14, 2020 at 15:11, Kai1980 said...
I have found that many projectors have a vertical lenses shift that is much larger in one direction than another, by this I mean if you ceiling mount it the lens shift will be greatest towards the floor and if you place right side up on a surface the lens shift will be greatest towards the ceiling.
There have been a couple of times I have had to flip a projector upside down inside the enclosure in order to get the image down to where it was needed. Ideally you would use a projector mount on the "ceiling" of the enclosure in order to more easily keep the projector level and square with the screen wall.
This^^^^^^^^
I have 2 jobs where this is the case. Both times the projector had to be upside down to get the proper lens shift.