zetabow,
I've been to Rod's class and will try to answer your questions. I think you are closer to what he advocates than you may think.
Rod's explanation of the feel of back tension is to hold an arrow in both hands, raise it to about nose level and try to pull it apart using your back muscles. He also uses a form master a lot in his classes and this is really the best way to learn the feel that he's talking about. Both for the draw (using your elbow to get a rotational or angular draw) and for the release sequence. On the release, don't let the strap of the form master pull your elbow forward. The harder you "resist the strap" the better.
When you shoot without the form master after a few shots with it, you will get the dynamic release that he advocates. He is also not "hard over" on the touching the shoulder but insists that you have a consistent follow through position.
If done this way, on release, your string arm elbow should/will move from its full draw position towards your back and down. Ideally it will move in about a 45* angle toward you back.
This is also very much the same form that is advocated by the National Training System as being the best release and follow through. Your string arm hand will end up at the back of your neck or on the top of the shoulder. If done correctly, you can't stop it.
Rod refers to this as a "strong shot" and says, " You can't shoot them too strong."
Rod, if I screwed up this explanation, please chime in.