this is a mount for the open bullet feeder project from ammomike83 to mount it to a Dillon case feeder. the one I have was bought early 2018. it fits best were placed in pictures but will work about anywhere on left side.
install a section of threaded rod (I had 12mm x 1.75) to thread the two brackets together then use connector and two small screws to keep them from rotating when positioned. I used 80%infill on the mount and 100% on the connector.
gray and blue