The 3 VPI dual-motor flywheel drive units is an interesting approach. What is your reasoning for the ultra low power drive units?
Seems to be the exact opposite of how Voyd used 3 high-torgue motors to increase the rotational mass of the platter for greater speed stability.
Anyway, I applaud your dedication and planning. Seems to be a mjor undertaking. Wish I had the skills(and workshop) to do it.