Okay I know I know post in trick tip forum. But I've recently been trying some 7s of 30ish feet jumps. I can do 540s pretty easily now without grabs...don't really have to throw the spin too hard. When I seven though I need to throw it a little harder..duhh..but it's throwing me off axis a bit. I'm really not bringing up my knees at all yet. Heres a POV vid....
http://www.youtube.com/watch?v=buV3BhbumtQ
Any tips? On a trampoline I have this problem too if I throw too hard. Thanks.