Okay, so I am setting up my first theater room and just mounted the projector 15' back from my screen wall. Powered up and the picture is way off to the right of the screen. My mount allows for some adjustment but if I turn it far enough to be centered in the screen it ends up tilted and leaning. I understand how the pincushion function works and this is not the problem. I went back to the manual and discovered that the projector should be mounted at a right angle to the screen! I just assumed that it should be centered to the screen so thats what I did. Thats what I get for assuming! Anyway, my question is this, must the mounting be at a "true" 90 degree angle to the screen? This seems a bit extreme since my screen wall is 134" wide, the screen is 96" wide, leaving 19" spacing on both sides of the screen. Does this mean that on the other end of the room the projector should be only 19" from the side of the adjoining wall? It's not a problem for me to move it but I want to get it right this time. Any suggestions or words of advise?