I got really frustrated fumbling with the four tabs around the hatch screens and then taking the screen all the way out and setting it down somewhere just to close the hatch. "There must be a better way...."

I used the smallest brass hinges I could find and put them on one edge of the screens. I drilled and tapped #4 holes into the aluminum frame on the outside edge and mounted the hinges with SS #4 screws. For the plastic hatch trim ring, I used self tapping screws. I had to insert a plastic block (the black thing) in order to make the hinges stand off at the right height.

I put all of the hinges on the inboard sides of the screens so that they could be manipulated while standing in the companionways of each hull. Only the one swivel tab is needed to hold them up on the outboard edge. These work really well. Now you can stand in the companionway of each hull and, using only one of the tabs, lower the screen and get to the hatch supports easily. No muss, no fuss.