16mm film roller mounts

EDIT: I've completely redesigned this and posted it as a new thing. https://www.thingiverse.com/thing:2795254

This is a design for mounting film rollers at the top and bottom of a 4" wide PVC pipe. This is part of a larger project in building a continuous processing machine for 16mm motion picture film.

This model is designed around [VEtienne's model "35mm + 16mm Sprocket Roller Package (1/4" d-shaft bore)"](https://www.thingiverse.com/thing:2375925/#files)