Thanks for the reply. I've been thinking about this all day and I have a theory that part of the reasons for the arms dragging is due to the fact I'm left handed but play right handed.
My right elbow is in a neutral position at the top, but during the transition it just hangs back and goes into a punch position the whole way down. I think this may be due to the fact that i have no skill in my right arm for throwing, etc. While most good players seem to drop the right elbow on the downswing, perhaps naturally, I think this is something I'm going to have to consciously work on.