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Published on Sep 30, 2012
This is a shape modification of my Pentultimate (mechanism v2.5), using caps to create a rhombic triacontahedron. This is the second example of this puzzle. The first was designed by Tom Van Der Zanden.
This modification was first suggested to my knowledge by Robert Webb in 2003 on the TwistyPuzzles forums.
One interesting thing about this modification is that it doesn't change shape as many other pentultimate shape modifications do. It's always a rhombic triacontahedron after every turn.
Every piece orientation matters, as opposed to the Pentultimate where only the triangles matter, or the Icosamate, where only the pentagons matter.
It was printed by Shapeways using their "WSF" nylon material.
At the end of this video I'm attempting to show how well the puzzle can turn by using only one finger with fast turns, which is a tough trick to accomplish with a custom made twisty puzzle.