In this photo you can see how the 5/16” aluminum rods are attached to the flange and how they slot into the furrels in the door. To attach the rods to the flange, I drilled down through the centers of the rods using a drill press and tapped the holes using a No10-32 tap, then just used No10 x 1” machine screws to assemble. To cushion the screens from the furrels, I’m using a 1/8” x ¾” rubber washer.