Looks like you're doing a lot of good work with her Liz and she's enjoying it. I'd avoid the ball in your right hand though. I know a point can be made that it shouldn't matter. You only mark or reward when she's correct, etc.. but when you go out to do the full routine and that reward isn't coming,,,,,,
She could start wrapping and crowding looking for it over there. Some dogs, maybe that wouldn't happen but it would be easier to just avoid it and keep the ball always on your left.