Like the stupid Sprinter Tax I've been paying for years!
I purchased it during boxing day sale. That probably explains the delta.
I am obviously missing something because when I go to their website the only photos are of a fully installed setup. There are no images of the individual parts. And the photos in the instructions are quite minimal, one pic of the mounting plate from a distance.Did you look at the pictures on their website and the directions I linked?
These photos are great. Thanks for posting them.