D
Dick
Easy and economical. Open the hatch and have someone hold a piece of cardboard up against the opening. Trace the the inner lines of the opening and make a pattern. Lay the pattern on a small piece of nylon screen material, mark, and cut out. Use 3/4 inch, self adhesive velcro . Stick hook side around the edge of the screening. Stick other side around inside edge of opening. Works great.