When you remove the big TV you will find a hot open space. It will provide access to the areas behind your other cabinets. I stuffed the area with fiberglass insulation then took a piece of masonite that I cut to slightly over size and installed it using the pressure of insulation to push back and hold it slightly in place. Then took brown duck tapes and taped the seams. Works great. Less heat, no rattles and lovely storage. See my other post in this thread on TV installation. A nice swing arm really provides flexibility for a 15-26 inch lcd tv. I find the 15 inch is plenty.