Thanks, I'll probably buy it today. When you say it only accommodates 5/16" screw length, do the screws simply block (hit a solid bottom) at that length or do they break internal components? In any case I'll keep that in mind and be careful.
Since I need mine as close to the ceiling as possible (I might even have to angle it to get the screen up by 1-3 inches, in which case I'd rather keep a barely deformed screen than destroy image quality with keystone), I was thinking of screwing the projector to a 1/2" board of solid hard wood, and then screwing that to the joists in the ceiling, allowing me to have it as little as 1/2" down from the ceiling height, does anyone see anything wrong with that? Due to the steep projection angle even with lens shift I need it as close to the ceiling as I can and even that may require tilting it.