I use the millenium teeth on dozens of figures and have never had any problem keeping them parented to the HEAD. Not the body or anything or part else!

Yes, they work great with V4. I got a set in her head right now.

I cannot save the world. Only my little piece of it. If we all act together, we can save the world.--Nelson Mandela
An  inconsistent hobgoblin is the fool of little minds
Taking "Just do it" to a whole new level!