Well launch angles aren't all that hard to calculate. Don't need fancy equipment. Markings on the cage like you started this post with dom. And it doesn't really matter what level. From 12u to MLB the swing is the swing. The launch angle is the launch angle. As for the 'teach'... well cabbage that is the $64000 question isn't it? It's just not that easy. That's why I am a big believer in video and zepp etc. got to get the feel for where those angles are and then just repeat. But one thing is for sure. We have to get Way from this antiquated view of hitting it back at the screen or hitting the back of the cage.