Whats the trick to getting the board back under you when doing an air raley?

bring your arms and handle down towards your knees. Its the "close the window" motion. Wait for the snap you feel at the apex.

Wait for the tug on the rope and then push your arms down and it should create a hinging motion.

Look up at the top of the tower, people tend to look at the water or at their board which will send you rolling.