I'm looking for a scrambler to help me practice audio memo for 7 words - basically one which always gives scrambles for which the edge solution requires seven 3-cycles. Does anyone know of such a tool?
Nup, the screw stays in fine without the centres.
I should add, last time I assembled it, I made sure each side was really tight and then it worked fine and turned fine for a few minutes. I did a few solves and then one side exploded as has happened each time.