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Heptoid
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Three axes with 180 turns each in a doctrinaire puzzle. With one piece type more than the octoid.

The Heptoid is a 3-axis deepcut puzzle that turns in increments of 180. This puzzle is related to the inventor's previous Octoid, but features heptagons instead of octagons on the surface of the puzzle. This was achieved by adjusting the angle that the 3 axes are "raised up" from a flat plane. On the Octoid, they are about 26.2 degrees, whereas on the Heptoid they are about 14.9 degrees raised up from the plane.
This puzzle shares many piece types with the Octoid, and the only pieces that are unique to each puzzle are the small triangles that surround the central polygon.
The external shape is similar to Oskar's Hepta Twist.
Like the Octoid, the Heptoid can jumble. The angle is about 47.98 degrees. A closed form is unknown so far. See image 8. But the only thing you can do with the jumbling is to do a 7 turn sequence that restores the shape.
Height: 67 mm

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