I enjoyed your craftiness. It gave me some ideas to make some for doves as well. I am in the Firth area and we are about the same age so I appreciate your ideas and the video.
I made three decoys similiar to these about ten years ago. I call em "Spinnerbait Ducks". I took a brown coat hanger and attached it to the keel then wrapped it once around the neck then up in the air. A ball bearing swivel at the end with two plastic bottle bottoms cut to catch the wind. Paint one side black and one side white.