This is one of the puzzles I revealed at the 2014 Dutch Cube Day. The others are- My Golden Cube 2 Extreme (and variations)- https://www.youtube.com/watch?v=veMyI8RGRG4 My record breaking Giant 4x4x4- https://www.youtube.com/watch?v=zzBFwFUA6YY Read about all my puzzles on my website- http://tonyfisherpuzzles.net