I have A TDP-MT200. It is in a dedicated 13x18 room in the basement with a dropped ceiling. The image is 120" diagonal at 16x9 format. I have it on a adjustable shelf on the back wall just a few inches from the ceiling which is about 8 feet high. My problem is that to get my projector at the correct viewing height I have to tilt the front of the unit up to get the image high enough to be comfortable for viewing. Then I have to use Keystone Correction. It is at +4. The image is actually fine with correction. Is there anything else I can do to prevent using Keysone Correction? I have tried using a ceiling mount and it was no different. Thanks for the input.