Review on White AMER Projector Mount - Ceiling Bracket for LCD DLP with 360° Tilt & Swivel - Supports 30lbs by Yiorgos Reynolds

I chose this mount for my Benq 3550 mainly because I needed an (advertised) 8.6" spacing to fit my screen without keystone correction . Once I got close to 9 inches, everything was attached. I had to get other screws besides the ones that came with it, but that's what I expected. My local hardware store had what I needed. The round part of the mount had 4 (instead of 3) spiral grooves, which allowed me to mount the projector very close to its center of gravity. I still had to tilt the projector up slightly to get it perfectly perpendicular to the screen (not a trapezoid), but the hex nuts allowed them to be tightened well without being too tight to move them a bit by hand. The trick is always to allow some adjustment while still staying where you placed it (since tightening itself can cause movement). So far I've been lucky and it's stayed where I aimed for. Since I have a screen, I wanted to get the image right between the edges (on all four sides) as large as possible. This vehicle allowed me (in my case) to repeat it without keystone distortion. Your experience may vary but I think it's a good vehicle.