nice idea alan.
scotch and soda do a version similer to this called a breakout box basicly a ring and a base, the top coin makeing the roof, the copper in the middle and the any other coins that will fit in the base.
the copper cannthen escape when desireed.
there a description similar to yours that dosn't hint to how the coin unique works, not sure if this section is open to all on the forum so please be carefull about your descriptions, we don't want any masked magician's getting wind of thease two gems of coin magic and spoliling our comercial success.
this is not haveing a go so please don't take offense, honest.
