So, it has been some number of years (wow 6 years already!) and I have been out of the scene, but that just means I am wiser now than before. My toolset, experience, and skills have grown significantly.
Just a month ago, I purchased a 3D printer. Obviously my love of all things animatronics has not changed one bit. So, now that opportunities have opened up again, I am in the process of re-designing the mechanical internals of the Animatronic Elvis to use standard servos. I still have 4 of these busts. Time to put them to some use.
My first goal is to create 3D models of all of the original parts first, then begin modifying them to house the servos. So far I have redesigned most of the eyes mechanism. It still needs some tweaks here and there, but I am getting really close.
I also intend to do a very different design for the neck mechanism so that the head can be installed outside of the bust.