Rivet angles on sub-panel. I had to use for the left side angle 4 AN470AD4-3 rivets due to the fact that the heads of the larger AN470AD4-4 rivets would not clear the middle panel edge. The rest is riveted with the larger rivets. The only thing that is left on the mapbox is the door hinge. I ordered the Guden (www.guden.com) hidden hinges. This hinge will keep the door flush with the panel surface.