Perhaps Spookey, you are going to get to this later, but how about the evolution of the Theories of Power and introduction of the sine-wave theory?
As to the former, we had to memorize "reaction force, concentration, equilibrium, breath control, speed and mass." Sometime in the early 80s? there was a push for "centrifugal force?" Did that ever make into the official publications?
As to the latter, when and where was the sine-wave introduced? Also, I have read about it but have not seen it. Is there any website which might have a particularly good representation of this?
TIA!
Miles