Don't forget the null figure trick. Actually, this is one of the reasons I tend to make figures instead of props. Alternate Geometry reportedly has problems in props, MAT poses have the work-arounds we've discussed, and of course joints are a no-no in a prop. Conversely, smart-prop behavior may be approximated by making the prop conforming, with a dummy body part; aka, a sword figure would have BODY, hip, and rHand, unless you wanted to be able to twist and swivel the blade in the hand, in which case the actors are BODY, hip, rHand, and sword. Only the sword contains geometry; the rest are empty actors.