Puzzle Details
This is Tony Fisher's second puzzle using Geert Helling's ingenious method of adding two new layers to a 4x4x4 Master Cube. Having made a 2x2x6 Tony took the idea further still and produced a fully functional correctly proportioned 4x4x6. Only one has ever been made.
External Links
twistypuzzle articlehttp://twistypuzzles.com/forum/viewtopic.php?t=2341&highlight=4x4x6