Mason Jar Adapter

A friend of mine recently came to me with a problem- she had a poultry feeder designed to accept a narrow mouth mason jar, but only wide mouth mason jars and no way to adapt the two.
Naturally, I got to work on a solution, and I now present Thingiverse with this adapter. Screws lightly onto the wide mouth mason jar, and has threads on the outside of the narrow side to screw onto the poultry feeder. The fit isn't quite perfect, and the adapter may need to be coaxed into the feeder, but it's solved my friend's problem, and I don't know that I'll come back to improve this.