Is it possible to parent an armature B to a bone inside a different armature A? If this question makes no sense, what would be the best way to carry this out, in such a way that armature B is unmodified and the two armatures are not unified into one? Suppose that artist B is creating a model B to be held in the hand of a character model A, each with its own armature, and you want to be able to connect them as simply as possible, to allow for later updates to B.