Well, it ain't pretty, but it feels pretty effective. I had a real challenge with the corner piece that had broken off trying to keep it lined up, but I held it in place while I put on thin layers of Epoxy and hit it with the heat gun, so would cure the epoxy quite quickly.
Instead of feeling "floppy" in my hands, it feels really solid now. I will give it a day to cure, then will start working on the expanding foam.
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