I have nearly completed the work on a vertabra that should allow the spine to move in all directions as well as rotate some, in Turbo CAD. I will be able to attach the rest of the skeleton directly to it but making all this walk and move correcly is going to be alot of work.
I think maybe I should use fiberglass for the spine and ribs because it would probably work better and flex like a spine and ribs would not to mention light. The vertabra idea is too difficult.