[Networking] Sync child rigidbodies

Hi everyone,

I started to implement the networking system in my project, but i don't know how i can handle child rigidbodies. The NetworkTransform component only manages the parent object of the prefab. Actually the 5.2 update adds a "NetworkTransformChild" component but only sync transform position and rotation, no physic.

Here is my prefab hierarchy :

-Parent Object : no component, just here to regroup the 2 childrens

--Body : contains a rigidbody with box collider, and the main script

--Feet : contains a rigidbody with box collider and a spring joint connected to the Body

Does anyone know how i can handle all my rigidbodies in order to have good sync of the entire object ? Or do i have to wait another Unity update, hoping they will do that ?