Bill-
Pretty amazing!
But I do think that's not Your Generations's Yo-Yo!
I think it's pretty heavily weighted and balanced around the outer edges, has a large center opening for the doubled up string, a supple high tech fiber string, and BALL BEARINGS!
At least it looks like it does anyway. I haven't seen one in years, myself.
Probably a NASA side project or something out of Lockheeds Skunk Works.
Or maybe the Japanese decided to copy the original design and came up with a few design improvements and manufacturing QC innovations. Then licensed the Chinese to build it for less and flood the world market. I wonder how Duncan Yo-Yo's stock is doing on Wall Street?
Joe. :teeth :thup