Hi Shapeways fans, Traheptrix was inspired by Timur Evbatyrov's Trapentrix puzzle, but using heptagons instead of pentagons. Like Timur's puzzle, also Traheptrix is a doctrinaire and deeper-than-origin cut twisty puzzle. All pieces are stair-shaped with 9 steps per stair, which keeps the pieces together, especially the little triangles. Watch the YouTube video. Buy the puzzle at my Shapeways Shop. Read more at the Twisty Puzzles Forum. Check out the photos below. Enjoy! Oskar