I am in the final stages of screen construction but have run into a few probs/questions. First is how do I determine the width of my black out border? I am building my screen on a fixed object that is rectangular in shape but about a foot larger in each direction than my actual viewing area. I will sometimes switch formats, does this mean I will always have some section of the outline that will be somewhat lit up? I hope I am explaining this correctly... I just don't want to finish this and find out the blackout isn't even working for me. Second question but related to the blackout is the material used for that. I have purchase a polyester which seemed like it would be good for the blackout, however it does seem to reflect a lot light making it almost pointless. Is it my material or am I doing something else wrong?