How do you guys have the time???
My DD is at gymnastics from 3:45 - 7:15 on Mondays and from 3:45 - 6:15 on Wednesdays. Then, she goes to Wed. night church. Every other day, she doesn't get home from school until 4 pm (I have to pick her up on gym days) and is in bed by 8. That's all she does. I'm afraid anything else would be way too much.
Personally, I think we're insane. Something you'll learn about gymnasts, though, give them a day with no practice, and they very quickly find another activity to fill it and then beg for permission to participate. The intense drive that compels a girl to optional levels isn't limited to just the sport. It turns up everywhere.