Hot-air retainer support for Rostock Max

If you're like me you may have found that warm air blowing across the heated-bed seems to help keep printed parts from lifting off the printing surface. In order to keep the heat localized a piece of cardboard is placed around the periphery of the heated bed. The problem with simply propping the cardboard in place is that it can shift position and jam under the Rostock Max cheapskates- this can be seen in one of the pictures posted. This device is designed to position and support this piece o