So, I built a replacement internal support plate for this broken one. This material is pretty brittle and, evidently, this one took an impact at some point. I decided on this 5-ply 1/8" cutting mat material thinking it wouldn't split or crack. I got a decent facsimile, yet it is not as rigid, or thick,  as I would like. If you are running Tekno bags, take time to inspect the internal rigid panels from time to time or after an impact. Especially the deepest mounting
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