I decided to line my Mits RPTV this Saturday. I found a place that sold duvetyne. They recommended I go with Commando black out fabric. It's blacker then duvetyne, and you can't see throught it. I used staples and then painted them like Chris White. Mine didn't turn out quite as aesthetically pleasing as Chris's, but it got the job done. I then decided to make mattes for the different aspect ratios. I bought some black foam board. It wasn't near as black as the commando black out fabric. I glued the fabric to the foam board. I watched one movie on Saturday before I made the mattes. Just with the black out lined interior, there was a tremendous difference in black level and overall picture. I had to adjust contrast, brightness and color level. Using the mattes on Sunday was awesome. They make a tremendous difference. If nothing else, you need to make aspect ratio mattes. All of this cost less then 35 bucks. The best investment ever.