First of all: Are the photos of "Vespa riders". In this state, one gets delivered the door. It is produced slightly V-shaped. Who will be engaged in the product quickly realize that this also makes sense:
The grille door is braced in any door means of the adjusting screws (see my customer pics). Here, the V is compressed and the shutter moves together. If the lattice door not built V-shaped, they would either during bracing compressed such that it no longer rises or could not be distorted, which would lead to a rather shaky mounting.
Advise: Do I have but from the attachment with double-sided tape. Although the manufacturer claims that this is possible, it's more crap. By bracing the door wandered this out slowly and fell after 4 days of alone out the door. Screwed to the terminals, holding the bomb hard and is built to last.