From an Idle, do a clockwise propeller spin on the right handstick. After the first propeller spin bring the right handstick out of the propeller and bring the left handstick in for the next propeller spin. Be sure to wait long enough so that the left handstick is hitting the devilstick on the same side and location as the right handstick did. Otherwise this would look like the Windmill trick. Also the left handstick keeps the devilstick spinning in the same direction. After a single propeller spin with the left handstick bring the right handstick in for the next spin. Then just keep alternating handsticks for the propeller spins.