I am going to be traveling with my Inspire this summer. and I got a big sturdy case to check it in, because I didn't trust the original case. I've read that you can't check the batteries, because lithiums of that size are dangerous to check, and need to be carried one. But My question is about the controller. It also0 has a pretty big lithium ion battery in it. Can that be checked with the quad, or does that also need to be carried on? Any advice from seasoned air travelers?