Sounds very interesting...care to share a bit more about individual signatures?
I'm with you on the multiple centers etc. Bucket o' Dead Poultry. How do we monitor balance or is that exclusive to the realm of feel?
Remember balance is not an Imperative . . . . Alignments come first . . . . So I'd say you could have a wacky swing and perfect "balance". Bottom line you have to "align" your pivot motion in such away that you can locate low point consistently in the proper spot. I'd say the Hula Hula basically is "balance" in relation to where the head or center of the pivot/shoulder turn is . . . so if you are "hangy backy" or Bob . . . you may be in balance but you may be sacrificing alignments and low point for perfect balance.