Very nice work as expected from you. On the mounting holes for the blade; On my antique Cat graders they had a tapered hole in the arms and a tapered bushing on the mold board to take up any play and overall made it much stronger. Here are some photos from my restoration in the works of a grader:
Circle with some other pieces ready for primer. The design of the circle sure hasn't changed much since 1930. I am amazed at how well the angles are bent. Cat must have employed some of the finest blacksmiths in the day
Closeup of the arm end. See how they mount from one direction.
RUST!
Detail of the cone on the moldboard. Not sure if I want to restore this or make new again
