The following article is taken from the original announcement in 7/2012 on TwistyPuzzles.com.
This is a puzzle I had printed in 2010 and then set aside as I slipped into a work-related coma since then.
But I finally put it all together and thought I should share it, even though it’s just a shape mod of my Pentultimate (version 2.5 mech).
My Pentulimate design is already large, but extensions to make it cubical make for a very large puzzle. It’s about 4.25 inches on an edge, or 108 mm!
This shape mod would have to happen eventually I think, but I believe it was first suggested by Robert Webb about 10 years ago on this forum.
Thanks for looking!