Hello all, I have just purchased a couple of used projectors, a Proxima 9210 and a Compaq MP2800. I have been experimenting with screen sizes on a white sheet (my room is roughly 16 feet by 18 feet) Any suggestions on screen size? (I am assuming 4:3) I can place the projector up to 18 feet from the screen. I would like to build a fixed screen (my ceilings are 9 feet) but I am confused as to whether I should paint hardboard, use blackout material and build a frame, or use some type of thin plastic sheeting that can be purchased at home improvement centers I have read about. Any suggestions would be greatly appreciated! Thanks in advance for your time!