Yep Mine works just fine
You have to use the end of the string without the knotted loop and open it up to go over the outside then twist it once and go back over the outside and pull it tight
Even then it is fairly loose and winding the rest of the string is tricky but once done it works, might even be able to make it sleep depending on your Yo-Yo Skills
Good Luck
There is a graphic in the club newsletter