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A small number of Eastsheen 2x2x2s joined and extended to form a 2x4x5 block which poses a new kind of challenge.
In Tony's own words: "Not to be confused with standard cuboids like the 3x3x5. Each one consists of a small number of Eastsheen 2x2x2s joined together. Some cubies have then been extended to form the solid shapes. These extensions have been carefully designed so that only a small number of moves are possible at any one time, the others being blocked. Quality is OK, though they can become a bit fiddly at times."
Today these puzzles made by joining two or more puzzles and extending them are known as "Evil Twins".
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