The version-zero artefact: black-bodied Super 3x3x7 carrying circle plates on both square faces whose inner rings break free only after specific layer moves. Retailers rate it ten-out-of-ten difficult - and nobody who has scrambled one argues.

Despite seven layers it stands nearly cubic at fifty-eight millimetres, a proportioning feat that still impresses engineers as much as puzzlers.

Features:

• :00 algorithm with dual crazy faces
• Rated 10/10 difficulty
• Nearly-cubic 58 mm proportions