Here was my case and how I solved it in case useful. I had a character:

I wanted to have him carry something. So I exported the puppet and reimported it (makes a copy of all the artwork automatically!), then edited the copy in Illustrator.

So he fit nicely into the artboard background. But the new content did not fit! I just drew it outside the artboard without moving the existing puppet.

This new content is nested in a layer (near hand) so I can attach it to the hand. (I may use a trigger to show/hide this new content.)

But the origin was different when I saved the file.

So I had to click on the origin and drag back to the main character's belly button.

I did not move the character in the Illustrator file, so all the main character rigging was preserved from the original puppet, and I can copy/paste takes between the original puppet and this new puppet. (If I had recentered the character in the Illustrator file, the drag points, sticks etc would not be lined up with the artwork any more)

Early draft of resultant scene... I just drag the hand around.
