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This thing is so sweet, it would be so cool also if the number of coins it takes could be configured, but to tell you the truth, this thing is just awesome as a concept, let alone a physical printable thing. What I think would be cool would be to use this to sell small 3D printed objects, such as whistles or mini gear cubes and such, just as a way to get people's attention and show people the amazingness of what printers and designers are now capable of.