I have an Armstrong plate that came installed in my fishing boat and because of the thickness of the cored deck in that area it was necessary to make a couple of angled notches to allow the locking arm to slide inside. The installer also sealed the core. So there was a bit more work to do beyond cutting the hole but not much.Those slides show that other ports need sealant (left side is Armstrong, right is Beckson style).
With the Armstrong ports you literally cut a hole and you're done.
The world gave up talking to marketing departments years ago. Hours of your life you'll never get back.Used Beckson on my kayaks. KISS. In their written product description, Armstrong says no sealant, caulking, or fasteners are needed. Their installation slides, however, show a caulk or sealant being used, as well as fasteners. Does Armstrong's marketing department talk to their operations people?