I received my parkland plastic today, 5X10 sheet, and now I'm ready to make a frame and mount it. However, I'm not sure what dimensions to use. I'm using a diagonal of 100". I will be watching widescreen movies, what are the measurements I need to cut? What kind of water based glue should I use? How thick should the border be? Since aspect ratios are all different, is there a happy medium I should consider or just go with 16:9?