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Yeah that wouldn't be ideal. But setting it flush/ slightly recessed in a concrete slab floor, with DPM wrap in ground and even a silicon seal around the door itself should drop your chances there....

And I do like the idea of a dummy gunsafe, especially if it just has a stuffed old air rifle and a bent barreled 303 with no bolt. Oh and and a couple of 140 db sirens on a reed switch, hooked to a...

Something like this as a base - E cat safe. | Trade Me Chuck it underneath a box of old newspapers and hey presto