Thanks for bringing this thread back up ukhacker - perhaps one of top threads/concepts ever posted on the board.
Re: the 'throw' - get on a plane board, or image one.
Your right elbow stays on its plane, right wrist bends straight back on the forearm, on plane, and the 'throw' is on plane - if you had a ball in your right hand and threw it, you would hit the target/plane line, as Brian posted - where your hands would fly off - at and extension of both arms straight - think of the right forearm as a 'spoke'
Read Brian's article re: frisbee throws, and rock skipping
Right shoulder goes 'down plane'.
Hinge/rotation/mirror point (wrists bending/arching) is 'on plane'
right forearm, right elbow, right wrist (a great quote from Carol Mann on Mickey Wright's swing, Jim Mclean's show)