i don't really agree with 2 flat 2furious about doing this preferably with brakes. i learned that w/o brakes but i might be wrong since i was doing the flip with both feet on the pegs before jumping, well...
anyway i agree with 2Flat when he says that you need to have the courage to land and see what happens, you'll probably hurt yourself a bit, but not doing it will keep you from building confidence, and finding the right balance.
that said i don't think you're far from landing it, just concentrate on getting your feet on the peg and the other one NOT on the ground, best adice i can give you.
I'm not even sure i can do this one again, havent done it for a long time. My pinched nerve in my elbow keeps from from doing any tricks holding the seat anymore.