When I spin I always get off balance and land in the backseat. Somehow I correct myself in the air when I do 540s and I can do a 5 way easier than a 3 and with 7s im lucky if I can land it.
what i meant is just that you should make sure that you are getting a solid pop off the jump and now just spinning hard and carving of the jump because that will start to throw you a tiny bit cork.
so make sure you not trying to spin before you build your pop.