Quick tips:
1. Don't try to pass too early - the trick is about the rotation not the pass
2. Both hands should still be on the bar as you get to toeside
3. Edge further upwind than you think you should
3. Don't try to pass in the air until you can land it wrapped. I got stuck on them for years before I went back to basics now I barely ever miss them
4. Don't throw the hand you're passing to in a massive sweeping motion as you rotate. As soon as you let go of the bar glue it to your opposite hip