Installed the stiffener for the spinner back plate. My older kit doesn't have the nice matching prepunched holes in the two pieces, so I laid out the rivet pattern and drilled the holes. For the constant speed prop, I had to remove the entire center section of the spinner back plate, which I did with a jigsaw and finished it with a small scotchbrite wheel on my die grinder. I then primed and riveted the two pieces together.
