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File comment: In midturn
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The original idea came to me on January 2012.
There was one prototype before this. Both 3D modeled by ElectronicKid.
Note that at January, Constrained cube was not published. Edit: It was there from a long time ago, didn't know that
Idea was from Latch cube and Quarter cube (which are both Okamoto's masterpiece)
When you turn the cube, the center piece do not move.
This strategy blocks some turns. See the comments on Img05 and 06.
Because the center piece never turns, the center piece, center cap and the core are combined. Didn't used any screw.
I didn't scrambled it by now. I guess it'll be pretty tough
