Quoted from WJxxxx:A 3D printed case.
Not sure that you'd call it a tool, but one way to make sure you keep all your bits together when moving or storing a machine. Also guarantees you don't leave balls inside before you tip it and risk breaking plastics.
Plus it's really therapeutic snapping them open and shut with the magnets (which I forgot to fix in before taking the pics)
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Cool, need one for appollo 13