I emailed the photos to Darrel today. He came back right away. What I thought was a "faceplate" was a steel reinforcement that goes in front of the rear blade support plate. That took up the gap in the spacers. And for safety, the washers and lock nuts are used on the mount bolts as you thread the mount bolts through the flange. They just barely clear the gearbox, but it does work.
After setting the blades at 11 degrees and torquing all 18 bolts, I'm kicking myself for not asking Darrel for a blade angle. That is a bit of a pain. I never thought I would have to loosen the mount bolts to adjust the blades.
Jay