I'm researching for my first projector, and I have a question about ceiling mounting. My ceiling is only 6'8" tall. I want to mount a 16:9 DIY screen all the way up to ceiling. Do I have to buy a projector with lens shift to make this work? I don't know how low the projectors generally hang from ceiling. I don't want proj. bottom to be below 6' from floor. Will 8" from ceiling to underside of proj. be enough? Thanks, I sure need some advice.