[Mathew]

I'm still unconvinced...

Say you did keep the right shoulder onplane to followthrough, and the primary lever assembly ended up inline, in what way would you be off plane (e.tg. over/under etc), or where would the left shoulder be?

Chris

You could draw that one picture in a position - but just tell me how your going to get there. If the right and left shoulder are on a plane any line between that point is going to be onplane too. So if you use a point between the shoulders center for simplicity - that will be onplane too(not quite true but close enough for our purposes).

Now if the stationary point stays onplane - the right shoulder stays onplane - how can the left shoulder leave that plane. Now try to visualise the shoulder motions and ask yourself, how can you have a top of the backstroke where this could happen....it can't....