Your wrists and arms can do anything they want after the follow-through, when both arms are straight (the Manzella pic at the top has the golfer in the follow through position).
You can't influence the ball after this position...BTW, this is about the time when you really feel the ball get struck...
I could be wrong, but didn't Zick at the anti-summit say you can't change anything after point of release?
Drew