Jock,
"OK so expansion is more a building of back tension with little or no movement. I think I achieve that but am trying to add movement."
Correct. Just don't add the movement.
"If shooting with a clicker or trying to get the feather to the nose how do you do that without movement of some kind?"
Remember the clicker is on the bow, the feather is to the nose on the string side. Different animals! The reason I seldom address the feather on the nose technique is that in my estimation you can't do that without pulling further to the rear. I am not convinced that it works with the perpendicular movement I've been talking about.
Good expansion (for clicker activation) is done on the string side BUT!!!! affects the bow side and actually pushes the bow out towards the target a little (1/16 to 1/8th inch). This is why it is so hard to try to explain in words!!! What you do on the string arm/shoulder side will affect the bow shoulder and arm side. You DO NOT push the bow side out, the bow side GETS pushed out by the string side.
I strongly suggest that "feather to the nose" and "clicker activation" are done in different ways. AND with very different shooting techniques. FOR ME, any further movement of the string, string hand or arrow AFTER anchor will kill your back tension.
I AM NOT saying that it isn't a viable technique, just that that is not what I teach or support.
Sirius, Absolutely, a shorter bow will clear your chest more but adds finger pinch due to string angle at the fingers. A longer bow is more apt to hit the chest but reduces finger pinch. Why you see so many target archers with chest protectors due to 68, 70 or even 72 inch bows. There are always compromises.
Arne