I be install a projector in a theater room with a drop ceiling so I could not use the standard mount , I need something that would extend down from the joist above . mount to the joist present no real problem . however , the length of the extension pole be very problematic for the height at which I need the projector . the increment of adjustment be not fine enough and it would not seem difficult to engineer a mechansim that be infinitely variable . attach the projector be a bit clumsy as well . I find the extension arm too bulky to easily move they where I need . the pitch and roll adjustment work well but unlike what be advertise or show in the installation illustration , there be no horizontal shift adjustment on the mount I receive . thankfully I have it very well center . finally , the cable management system be sub-par . with all the bolt run through the extension pole there be precious little room for the power cord and a heavy duty hdmus cable . it do come with ton of different screw , bolt etc. . . to fit just about any projector . I get it to work but with more difficulty than should have be necessary . I would search for something better next time . PS : when I call the tech support line I be able to get someone on the phone but they seem know less than I do and I be new at this .