I need to mount a Stewart GreyHawk screen (96" x 54") in front of a window, but the holes in the top of the wood mounting brackets (which are about 10" from the top of the bracket) will not be high enough if I mount the screen at the level I want to mount it. In other words, they don't clear the window, and they would only do so if I raise the position of the screen about 4 inches. Is there any reason I can't simply drill a new hole in the top of the bracket about 6" from the top of each bracket to make a new mounting hole? It seems to me this would be fine, but I wondered if anyone could think of a reason I shouldn't do this. Thanks.