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Master Quadrant Ball
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A redesigned spherical 4x4x4 with eighteen circles with four segments each in the faces and edges.

The inventor wanted to make something based on a 4x4x4. He came up with this design, which has freely-rotating circles on every "center" and "edge" of the puzzle, and the proportions are designed so that all of the circle quadrant pieces can be exchanged, even with mixup-like half turns.
The puzzle resembles very closely the "All Around" which also combines the Mixup cousin of the 4x4x4 with 18 small circles.
It is quite big to ensure the mechanism was super solid, and easy to print.
Diameter: 120 mm
Weight: 510 grams

Two weeks after the first version the inventor presented "Sea Mine" seen in images 6-7.



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