Go a little easier on the inverts and work the upper body more. When you're going up, your legs should only be gripping enough to get a higher handhold. You should be using your upper body to hold yourself up when you're inverted in order to trick with your legs. If you don't have the upper body, and you're scared, you're definitely going to bang up your legs more than you should. Plus - when you're tense about it, you're more likely to injure yourself. The upper body and core are more important than the legs - just go back and watch your spacewalk or the spatchcock videos a few more times - you'll see how little she's doing with her legs if you watch closely.