Are you talking about this one?
<--- Also this one.
I've been scratching my head for a week trying to figure out how you could build a face turning icosahedron with out cutting off the corner pieces. I've tried using a shells mechanism, but still can't ever get the cuts close enough to the edge without messing up everything else.
This is just for my own puzzle building knowledge - I figure I can't invent something new if I don't understand the basics first! I've tried searching but haven't found what I"m looking for... I'm sure it's out there already but...
I guess you mean, without the corners falling off. Speaking for myself, it wasn't easy! Maybe it was easier for Jason, but this was my first twisty design.
Basics, huh? I guess things have really changed in three short years. I can't keep up with the state of the art today. But remember that until 2010, nobody had ever made a face-turning icosahedron before.