We found quite a lot of the paper instructions for the assembly of the Workcentre, very unclear. Some videos were a lot more help. When I started on putting the Workcentre together, I found myself sitting there for quite a while, until the penny dropped, as how to add another part, onto the assembly. Even so, great piece of equipment! Your most recent uploads, the 2nd picture, makes sense, also sussed, can shorten the width of the guard so bolts fit into the plastic mounting brackets. Will look at video etc on Monday and let you know how I get on.
Cheers very much mate.