I'm looking for ideas concerning the fabrication of a trap door type hatch for my fish cooler. The idea is to make putting a crappie in the cooler a one hand operation that requires the least amount of movement as possible. The crappie could be put in the cooler without actually opening the lid. I'm thinking along the lines of just laying the crappie on the trap door and the fish's weight pushes the trap door down, allowing the fish to fall into the cooler. Once the fish passes through, the door will return to it's closed position (some kind of spring loaded deal) Anybody built or seen something like this?