do it off of a bigger jump first. at least a little bit. i find that if you spin for bs 5 really fast and drop your front shoulder fast off the take off and grab mute it will invert you pretty bad. i get way too inverted on my bs spins. yours looked pretty good but you have to have more time to get rotation
first off... theres no such thing as a bio in snowriding. im pretty positive that what you have yourself there is a misty5 or an overly corked bs5 depending on what you wanna call it. either way, def hit a bigger jump and just keep looking over/under your shoulder til you see the landing. then put er down.