A sheet metal component includes a three dimensionally shaped first surface, a three dimensionally shaped second surface opposite and extending substantially parallel to the first surface and an edge interconnecting and extending about the perimeter of the first and second shaped surfaced. Flux directors conduct flux from a magnet in the lid to the magnet sensor. If so, an attempt is made to acquire the new lock and, on the failure to acquire, the administrator is informed that the lock has already been acquired by a prior administrator. The store uses the metadata to determine the storage layout for instances of the type.