We mounted the 106" screen and cranked up the projector! Then we noticed two wrinkles or waves in the screen forming a V. The Deluxe Model B has a tension bar behind the screen that is suppose to, when extended, create a flat, tight screen surface. Not here. At first I thought the tension arm was too tight so I adjusted it hoping the wrinkle would disappear. Nope. Still there. I chatted with a Dalite customer service rep and he said to contact the seller and get a warranty exchange. I'll see what happens.