Wow, Rick: those guys must have had a LOT of time on their hands. 😵
I used to be able to solve the cube. My math teacher taught me. After I solved it in front of him, he let me try his 4x4 cube. When I could solve THAT, he let me keep it for a Christmas present. He said I was his only student ever who was able to solve it.
(Truth be told, now I think the 4x4 is easier to solve than the 3x3... But that's only because I forgot how the 3x3 is done. I can get everything except the last side). 😛