my projector should be here tomorrow or tuesday. i put up my screen today the screen is a diy 92 inchs. the top of the screen is 24 inches for ceiling i will have to shelf mount the projector for a couple of weeks is my math right i figure the shelf should be about 7-8 inches from the ceiling? ceiling is 8 feet seating is 13 feet.THANK YOU

Mitsubishi Projector Throw Distance Calculator (http://www.mitsubishi-presentations.com/pdf/projectorcalculator.zip)