Hi again guys, i am looking for the role of the shoulders in both the topspin and slice one hander. The way i see it now is 1. They rotate fully, to where the opposition would be able to see the back of your front shoulder. 2. They then rotate and your front shoulder points pretty much at the net, at which point rotation stops. The backward movement of the non hitting arm near contact helps this i think. 3. The shouldrs then pretty much play a passive role except for possibly easing around at the finish of the stroke after the ball has gone. Is my take close to correct guys?