Your solution looks good!
I decided to "build" (cut out and shape) a second set of drop boards. I wanted a winter set so the teak boards were not suffering on the boat during storage. It required my router. I sealed the marine plywood carefully with a couple of coats of white two part epoxy paint. I like the white drop boards better than my teak ones. Easy to make and inexpensive. Adding a top board with screen was simple, too. I don't need to be as careful when handling and storing them now. The teak trim around the white drop boards looks just fine.