Here's a recipe for pulling the right arm straight back: Twist 10, Front-Back -20 on the collar and Swing -70 on the shoulder.

You are right about the collar twist: it is only good for small adjustments, because one gets distortions at higher values. Maybe my rule for the collar should be something like this: use it sparingly, but don't forget that it's there.

-- I'm not mad at you, just Westphalian.