Hi there . I´d need advice on using UST projectors such as Dell S718QL, LG HU85LA, Optoma CinemaX P1 on screens bigger tahn manufacturer specs. The decrease in brightness is no my concern but the possible edge distortion, shape distortion and mainly focus. This is intended for a ceiling projection on a 220" 16:9 screen for decorative purposes. Any sugegstion /experience is wellcome.