For 1000x scale (my question was from 1 kW and 1 kg for the rigid rings to 1 MW and mass of the rigid rings?) I would obtain 562% more, so 5623 kg only for the rigid rings. It is the weight of five Makani’s M600 which would total 3 MW, not less. The tether drag issue would be likely lesser. I am sorry for your conclusions from your analysis.
Moreover we should add the pendulum moments on the rigid elements due to structural shear by wind changes as I mentioned. So the potential of scaling of TRPT torque transfer devices comprising rigid parts is low, very low. It was the reason why I conceived a rotating device without rigid parts.