Bought a used Sony CRT PJ and need help setting it up. The manual only has numbers for 4:3 and I have a 106" 16:9. Also, I have figured out that it was setup for a very large screen, so I need the Medium CRT spacers. Not sure about the part numbers, but could be 4-395-560 (M-OUT), 4-395-561 (M-IN). I have the Large spacers which are numbered 4-395-562 (L-OUT) and 4-395-563 (L-IN). Also, I had no idea how HUGE this thing was whe nI bought it online and I think I'm probably going to have ceiling mount this monster to keep it from eliminating too much viewing area in the room. Should I reinforce the ceiling joists for this? The space is over the garage and I can get to it. I'm pretty much a newbie when it comes to the HT projector stuff and would appreciate any help that can be provided.