I agree about the undo problem. I save often, but sometimes find myself in a bind when I'm setting-up the bones constraints. I use custom, and manipulate the bones by using the sliders within the constraint window. This way I can watch how each constraint affects the motion before I save again! (Wrestling with bones/constraits seems more difficult then wrestling this creature at times, but, once they are set, you can enjoy some REAL animatin'!) Good luck! Oh, and BYW, I agree... I'm looking forward to seeing this beastie walking around.