Updated: May 21, 2020
Mario suggested that I watch Radio Dolores as a reference for this film.
This a short section of the film from Vimeo.
The puppets faces maintain a neutral expression as it is a single sculpted head, they do not blink. This is a good reference for my film as I have sculpted my characters heads with no replacement animation intended.
The difference is that I have chosen to have blinks in my film and moving eyeballs, therefore needing to have the ability to move these elements, opposed to Radio Delores where they remain in the head.