One of the best things we've added to Rickshaw, a 1988 DeFever 44, is an automatically closing back door screen. After two years it still works perfectly 99% of the time. I first saw the "Magic Screen" at a Walgreens but have since heard that it is an "As Seen on TV" product. Unfortunately, for application on a boat, since the product is made for a standard doorframe, it is probably not usable right out of the box. A sewing machine will be necessary. First trim the screen to the width of the door plus the overlap on the sides for attaching and sew on new black fabric tape or webbing on the sides. Next the screen will probably need to be shortened. It is first necessary to understand that for the screen to work properly the magnets MUST BE PLUMB. You will shorten the screen at the top - not the bottom. Since the top of your door frame might not be perfectly horizontal this means the top of the screen may need to be cut at an angle so that the split of the screen is PERFECTLY PLUMB. This won't be as hard as it sounds. Out-of-the-box, the top of the screen is supposed to be fixed to the top of the door, I.e., does not slide side to side But I wanted to be able to keep the screen open when hauling things in or out of the boat. So, instead of attaching the top of the screen to the door frame, I made mine where I could slide open the panels by attaching my screen to a web strip which is affixed to the top of the door frame with three snaps - one snap on each end and one in the middle of the webbing. I used snaps because the previous zippered screen door was attached at the top with snaps so the studs were already in place. But thumb tacks would work too, but the snaps make it easier for fitting the screen to your door frame angle. The webbing is really functioning like a curtain rod. And although it is attached in the middle to support the screen - the screen will close because I sewed on a large hook and eye to the top inside corners of the screen panels. So, once the web strap / curtain rod is snapped/tacked in place wrap the top of the screens over the webbing. This creates a channel that the webbing will run through. Pin the screen at the top and use painters tape to temporarily hold the sides. Then try it out - check the length, check to see if the magnets line up, check to see it it clicks shut every time you pull it apart. You should never have to do anything to close it other than let go. If hung correctly, i.e., magnets line up and are plumb, the screen should close automatically every time. Once you have it just right take it down. Stitch the top to make the channel and trim off the excess screen. Next sew on a large hook and eye to keep the top closed. I sewed mine on the outside top edge as the top of the screen is easier to reach on the outside aft deck rather than from the inside which is a step down. Slide the finished screen on the 'curtain rod'. Attach the 'curtain rod' to the door frame and use black thumb tacks to secure the outside edges of the screen panels to the door frame. I also added some black cord to create tie backs. I have pictures of the project for anyone who's interested. Belinda Wolfe