Hello, If I have the Panasonic AE700 mounted on the ceiling (about 40cm from ceiling), and I project to a screen 3 meters away, how high should the image appear on the screen without getting any distortion? I've heard you can place the image almost anywhere you want with keystone correction, but that might have a negative effect on the image. Whats the lowest the image can appear without compromising PQ? Would that be 30cm from ceiling also? can it go lower? or it should be higher? I've heard that the AE700 has a 63% vertical lens shift range, but I don't know what that means exactly.