I went a little different way with one of my plows.
This is a new plow. Somewhere in shipping the box was damage and a few of the parts were lost. The adjustment parts for the plow point were in the lost parts.
Brinly wanted $40 to $45 plus shipping for the parts. The set up I made cost under $20.
The back part (one connected to threaded rod and standard) is currently being use on a 12 inch Brinly plow.