Ignoring the unnecessary noise made by you, possibly to save your friend Paddoboy.... The entire Kerr Geometry Rotates ??? What all you are including in your Kerr Geometry ?? Do not say conveniently that you did not mean r <Rs (inner EH).. The Rotational Energy of the Neutron Star is with the rotating mass of the neutron Star, the rotational energy of the Kerr BH is associated with the Ergo Sphere, thats the point that......in the transition stage from NS to BH when star r>Rs, energy is within r, but when r < Rs.....where does this energy go ?? Many links now you will refer will tell you that the rotational energy of the Kerr BH is associated with ErgoSphere, but you guys never bothered to understand that how and under what process it so happens ??