Rick, I am on Day 25 a believe your thinking is correct. What is helping me at this stage is to imagine the I have a heavy log in my arms in front of me to start. It takes effort (imagined) to get the weight of the log to swing to the top of the backswing. My mind knows that it must start slow (pressure/speed 2) because of the weight and gradually increases in speed/pressure to lift the log to the top (4).
Then I transition at the top (surf), the weight of the log then starts to gain speed (momentum)on the way down into impact. I imagine tossing the log as far as I can as I am coming into and out of impact and it carries me right to finish, pressure (speed) at an 8 or 9 and fully extended.
When Bryan shows this type of move as he is explaining things I actually can feel the rhythm that the weight of the log creates.
Best of luck with your training.
Lance