I'm not sure why you would do this unless you had knitting more than halfway through and the original skein was losing its integrity. A new original skein would work better than these cakes for knitting/crocheting along. BUT it was a good experiment to try. And I learned a couple of tricks and that a nice, steady rhythm is the name of the game.
The winder does NOT like to make big balls/cakes. The biggest one is too loose so I rewound it. Here's the whole skein.