the installation be pretty straight forward . however , adjust it , as one reviewer have mention , can be tricky . when you begin to tighten the allen screw , the arm tend to move in the direction of the turn . also , tighten one axis sometimes jolt the other axis as well . as a result , I have have to just nudge the arm a little even after they be tighten to get they to position correctly . however , when all say and do , this be a extremely good mount . in fact , be be the only one I have find that be able to move my projector forward in the direction of projection .