Handmade Metal Puzzle - UndercoverUndercover. The aim is to uncover the inner core from the outer core. To pre empt the question; no it is not a Revomaze so to speak. Both the inner and outer core spin freely with no apparent way of disassembling them Currently there is no limit of the batch size that I will be making; in the sense that it is not a limited edition. For me personally, the puzzle is very much about the machining side in the sense that I really wanted to push myself and