Been spending the past few days starting the process of cleaning out my in-laws house in CT as my father in-law is in a home. While cleaning up came across duffel bags of decoys. They mostly appear to be home made and primarily bluebills. A simple cork on plywood with a counterweight screwed in. There were 4 of these things, which are huge, twice as big as any decoy and I am guessing was used for sea duck hunting on LI sound. Anyone ever seen such a thing?