this projector mount be a good buy if you install you projector and then never touch it again . I mean , do not put the lens cap on , do not push the power button , do not touch any of the cable , do not wipe dust off it , etc. . if you leave it completely isolate , this mount be a good buy . make small adjustment to the mount in a effort to precisely place the projection on a screen be challenge with this mount . the problem arise with the ball mount . there be no way to make precise , small adjustment with the ball mount because it be simply tighten in a compression ring . it will take you quite a bit of trial and error to get you picture precisely on you screen . once you have the image precisely on the screen , be careful not to touch you projector in any way . the mount be not stiff enough to absorb a touch to the projector , and you will end up skewing you image . now that I have it , I may keep it because it do the job and it be really cheap . but , I think I should have spend another $ 50 and purchase a more precise mount .