Hi, For around 10 years we've been using an 8 feet wide pull down screen for our projector / home cinema. Unlike most people, we prefer to look down on the screen image and our current screen pulls right down to the floor. The bottom of the projected image is only about 10 inches above the floor and we want to keep it that way. The screen has no black border or any black at all and I'm pretty sure it was made for the education / schools market. It was made in the USA by LUMA. The ratchet mechanism which allows you to set the screen to any height has now failed and the screen will no longer stay down. Does anyone have any suggestions for a replacement? I could be persuaded to go electric if it wasn't too expensive. Thanks. Cheers, Bob.