Tunnel Cube can be considered the inverse of Adam G. Cowan's Handlebar Cube
. Whereas Handlebar Cube has three handles at the outside that bandage non-adjacent corners and edges together, Tunnel Cube has three tunnels that achieve the same effect. The holes enable you to look inside the puzzle and to see which corners and edges are bandaged through these tunnels.
Watch the YouTube video
Read at the Shapeways Forum
Read more at the Twisty Puzzles Forum
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.