looking to design his own, simpler version of some of the animatronic mouth systems out there, Will Cogley has come up with a pretty elegant looking system. It may be lacking in some of the finer motion controls, like jaw protrusion but it seems to be good enough, and brings an interesting tongue motion to the table.
He says he’ll be releasing all the print files along with a detailed video for assembly soon, so watch his channel for more.