Doesnt seem to work for me Paul
I have a cube 1000mm X 1000mm X 1000mm. On top is a tube. I set the tube to rotate in Z
I group the cube and tube together
Then I use this in FP. However no matter which way I set it in Animation settings, or in "Keep Group Hierarchy" ticked or not ticked, it just doesnt work
Only way I can get it to work is by making it am animated vray proxy