Barbeto Drive 2-to-1 is an invention by Marcio Barbeto. It is a right-angle two-to-one reduction that does not use gears. Instead the drive has a sphere with grooves and some pins that follow the grooves. It is not clear whether this drive has any advantages over classical bevel gears.
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Read at the Shapeways Forum.
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Please order a 3D-printed do-it-yourself puzzle kit from Shapeways at this page (check with Oskar about screws and stickers), or contact Oskar directly if you are interested in obtaining a fully colored, stickered and assembled sample of this puzzle.