Thanks Wolfie again for the detailed explanation and further insight into the science or resonance and harmonic dampening.
Actually I have routinely bent my ankles as well lately but I omitted mentioning it for simplicity above. This could explain why I am not not getting the amount of chatter I used to be getting. But the aft shift thing is something I have never incorporated into my turns ..... not saying I am able to do it just because I want to. Anyway I should seriously look into this.
Thanks again. Your explanation has been useful.