Im here with the same problem. i thought about doing the animation of the object inside form, but the anchor point is alwayes centered, and there is no way that i could find to change it. ( i want the object to rotate from the buttom)
So i set the animation inside Cinema4d and then imported an obj sequence into form, but then I couldnt match the object to the the footage. this "ObJ Sequence" method is one way to get around this that may help you.
For me, Im still looking for a way to bypass that anchor point if anyone has a solution.