I have a Marquee 8000 that was set up for a larger (size?) screen. I now will be using the 8000 with a 92" 16:9 screen. As I have gone through the guided setup I can not adjust the blue or red tubes enough physically. The Blue is aimed too much to the right and the Red tube too much to the left. I have searched through the set up manual but I can not find any mention of how to readjust the tubes for the new smaller screen size. Any help would be appreciated greatly!!!