Hi, I'm starting a new game and it involves some kind of "crane". My whole object crane has a rigidbody on the root object and each of its child has a boxCollider. As expected, the centerOfMass of the crane rigidbody changes when one of the boxCollider moves. I'm wondering if it's possible to weigh each of these colliders because the whole weight is not supposed to be equally distributed. Let's say we have a big mass at the end of the crane, what can I do to simulate this kind of behavior ? EDIT : While I'm at it, I know that if you do not set the "centerOfMass" it is automatically calculated depending of the Colliders of the childs. It this possible to set just an offset while keeping this "automated" behavior ? let's say substract 1 from the Y axis to get a more stable crane ? I tried to put a rigidbody as well on the objects with the boxCollider but the objects started falling on the ground and I don't think the parent rigidbody would add up these weight also. I also tried the variable "attachedRigidbody" of the colliders but that returns me the rigidbody of the main object. Thanks for your time.