Swiss Guard: Car panels can be beaten into this kind of armour.
There is an off the shelf system that can be replicated which was the greatest achievement with so little. I want it to be exact in all ways without pondering why, because often it was trial & error & not theory that worked. Modernism established temporary wonders. On the subject Roman remains are rare in the UK because the intellects left it to the Celts, who tore up for their homes. Keep it a Bastion close to home.