It's impossible to discuss the fine points of physical technique via a text only medium. I'm not even going to try. My dojo has a very extensive and well-publicized seminar schedule; you're welcome to come train with us at any time.
You constantly try. You dont try only when you're stumped.
If you don't shift your weight you die. It's that simple. How about having the courage to post one video of your amazing secret skills at use in defense against realistic attacks? By you I mean Harden or anyone who allegedly has the secret.