Rain-X Rock Lock 3 Wiper Adapter

Subaru, Honda, and a couple other auto manufactures use Rock Lock 3 rear wipers. The last cheap one I bought was terrible. I think Bosch makes a good one but it's twice the price as the rain-x and I wanted to be able to use the same wiper on the front and back. So this little adapter is born.

Needs to be something UV resistant, I went PETG for now.