Oh I used to love to call the multiple changes in a row--of course they need to be working!
One of my 12u's did this a couple of weekends ago in a tournament. Predominately change-ups, one inning was nothing but change-ups. She had a great time and her team won the tournament. And she's not afraid to throw change up ever again.
We'll have to work that change more to throw it every pitch. . That's incredible results on only CU! Kudos