HBG2, Yensid - you discount the power of modern electronics. If both versions have all the motions powered with servo-motors synchronized to the same motion track, they'll move identically down to the millimeter. Done right, you could run with each half on 50% and superimposed, and the motions would match. And Schroedinger's Cat will have kittens.
And before someone says it: Yes, you'd have to reverse the signals for the one that is mirror imaged.
The important thing is figuring out a way to get Hattie out of Purgatory and back into the ride.
--<< Bruce >>--