Interesting that I learned something similar to that in the TKD I studied. Our concept was the feet were plated flat on the ground, and the power traveled up from the feet/ground, through the torso to the shoulders which were squared, across the shoulder of the trailing foot across to the shoulder of the striking hand, down that to the knuckles of the striking hand. It sounds complicated but after many applications and corrections, it begins to work. Perhaps some gi at work as well, but after a time on begins to feel the greater striking power. Does that sound in any way similar (if not exact) to what you are describing? It kind of does to me. Thanks for explaining that.