A gun safe door storage system is permanently affixed to an interior surface of a gun safe door. The positioning device includes first and second arcuate support frames, a mounting carriage and a drive arrangement. In a preferred embodiment the substrate is a multi-level wiring board. A separate conductor provided on the suspension may be electrically coupled to the separate bonding pad via gold ball bonding. that is higher than the E\u2032 value at 25\xb0 C.