Easy to use, but cheap materials

We have a stray cat issue in our neighborhood, namely behind our house. We don't feed them, so they have no reason to stay, but they do. This trap has done a good job of catching them, as three have been relocated with it so far. The handle, 'guard' around the handle, and trap door areas could all stand to be made with some thicker and/or stronger materials. The handle has come loose more than once on me while transporting unruly cats, and the door seems to be a bit too flimsy and easy to defeat.

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