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Octaball (sphere)
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A face turning octahedron transformed into a sphere.

This is one of the first transformations of the face turningn octahedron (FTO).
The first version was custom built by Tony Fisher. Moulds were used to recreate the FTO parts so the shaping would be done to these copies and not to the originals. To make the sphere it was necessary to cut it down very close to the mechanism.
With a non-solid FTO it can be problematic to make since the edges are non-solid and after cutting their heads are no longer being supported by the legs and there is just a little area for it to be glued.

Two years before the first appearance of the Octaball, Gary Spencer-Purvis submitted his patent for the Dioctipoid. Please refer to the separate entry. The Dioctipoid hit the market four years after the patent application and two years after the first appearance of the Octaball. By appearance and solving both puzzles are equal but the Dioctipoid is designed from scratch with a completely different mechanism.

This is the same puzzle as the Rex cube, as a face turning octahedron is its dual.



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