You and barliman would be minimizing your potential if you do not do this shoulder lift. I learned technique this in a masters class given by a lead player studio sessions musician at a jazz fest clinic. It was one of the most helpful sessions I ever attended. If you use it right, it works very well, and very efficiently. Again, the two of you are not making the connections. The control is shifted to the abdomen, the shouder lift is used in the fueling process of getting more air to work with. Once you have more air, you shift the process to abdominal support in contoling the air flow. The shoulders in this phase are then relaxed.