"Anonymous, you seem to be well versed in mechanics physics and geometry. I will therefore pose this question to you. What is the point of inflection (a calculus term used to describe the mid point where something changes direction or shape) in your body as you finished taking the step with the CBM and does it change as you are moving through the step. At first I though it was the torso area (not to include the hips) but I've been told that it is around the upper thigh to lower hip area. What's your take on this?"
A point of inflextion is a root of the 2nd derivative, or a place where a curve switches from "curve up" to "curve down" (maybe we should say concave to convex). Is that what you wanted?
Or are you looking for a local maximum/minimum, which is to say a root of the first derivative, or in plain English, the forwardmost or rearwardmost part of the shape? For that, I would say that it should be something along the lines of the "low center" or the center of mass - or the projection of that through the leading side of the body.
Some people might see it as being lower, but I think that is reflected in the perhaps overshaped shape of their dancing. I'd like to see the leading element or center of movement more closely matching the center of the thing that is moving - which is the entire body.