Sure thing. First off, double‑layer steel plating—two tons of tempered alloy plus a concrete core. That gives you the bulk, then an inner ring of composite fiber for shock absorption. For the lock, mix it up: a primary biometric scanner, a secondary mechanical dial that’s keyed by the vault master, and a third backup: a fail‑safe encrypted keypad that only boots when the first two are dead. Add a small, discreet motion sensor array on the outer wall so any tampering triggers an alarm. Finally, run a redundant power line through a separate conduit; if the main fails, the backup keeps the lock alive. Keeps outsiders guessing and the coins safe.

Glad you approve. Keep the coffee coming while we tighten the final details.