Anyone know anything about this one? Its in a blue case says Da-Lite Model L and it is on a tripod, 70x70. I'm just going to take the tripod off and wall hang it, so its not a big deal that it is on a tripod. They had three such screens being thrown out at the local university, this one was a silver type screen, the other two white all Da-Lites (I'll pick up another if they are still there but I could only fit one in the car at a time). This one had a tripod stand and the screen itself was in better shape (as in looked new) than the other two so I took it. Was planning on using it with my Sayett Mediashow projector. Anyone know the gain of this screen or anything else about it for that matter?