RE: Viper firewall broke loose.
It is plywood on the inside, but the nose is notched, and the firewall is notched, where they glue together, so it's not a complete, plywood-plywood joint. Plus, I think this thing is glued together with hot glue, not epoxy, the old stuff was stretchy and rubbery. And it does have triangle stock inside too, but they were only about one inch long, not the entire length of the firewall.