Here is another photo that shows the essential parts and what I believe is the correct order to put them all on. If I am correct in this photo, I did mine wrong on the plane itself, but it seems to be working how I did it and, like say, I'd have to remove the firewall to unscrew the big assembly and change it out at this point. I don't want to rip out any more foam in doing that, so I'll see how my booboo works.