In November 2008 Aleh Hladzilin presented his 3x3x3 Circle Cube. For the build of this puzzle he got technical support from David Litwin regarding CAD and acrylic laser cutting.
Details about the internal mechanism and more pictures can be found at the two TwistyPuzzles forum threads.
Size: edge length 8cm; circle diameter 6.6cm
External LinksTwistyPuzzles: Aleh's 3x3x3 Circle Cubehttp://twistypuzzles.com/forum/viewtopic.php?t=11600TwistyPuzzles: Aleh's 3x3x3 Circle Cube Internalshttp://twistypuzzles.com/forum/viewtopic.php?t=11619