We woIld like to put our new TV on the wall in the playroom but will need a bracket that swivels so that we can pull the tv round when we want to watch it (as the sofa is on a wall at a 90 degrees angle to the wall the TV will be on). What should we use to conceal the wires? We need to be able to leave enough slack so that the TV can be pulled round easily etx. Any ideas? many thanks