Think Right. Full-up hands should turn to the right direction. 
Base - Approach your Flier as you would for a normal Toss. You should initiate the twist about half way up the Toss. The Flier should already be twisting before the release. At the Flick, push your left thumb forward and pull your right index finger backward to help finish the twist.
Flier - During the Toss, help initiate the Full by looking over your right shoulder. At the Flick, push your right hand in front of you and push your left hand behind you while looking to the right.
Base - Once you have released, and the Flier is facing backwards in the Full, begin to reach for Both of the flier's feet. Remember, since the Flier is backwards you will have to grab a backwards grip for both feet.   After you have grabbed the feet, continue to rotate the flier until she is facing forward and bring her to hands.
Flier - Keep your feet together, almost in a Cupie position, until you have rotated all the way around. It is important that the Flier stays in the tube during the Full. Base; don't jerk the Toss to much as it might push them out of the tube. Also, Bases, you have to spot that foot before the Flier has completed the 360o twist.