Hey S,
i am not sure I understand exactly what the path looks like and how the letters need to rotate around it, but here are an idea:
- once you have all in place, delete history for your surfaces, all of them.
- freeze geometry
- NOW parent the faces of the letters to the sides
- use a locator (create - locator) for the animation, parent the srufaces to the locator and that should be it. If the locator is centered on the motion path and following it, I beleieve you should be Okay
I'll check back soon to see what happened...