The edge ribs appeared to be so stiff, we decided to create extra support on the metal corners that mounts the ribs to the spacers. We made these ourselfs out of a strip of aluminum. Ifabrica has the advantage of having all sorts of equipment and workshops, including a metal workshop. We could make these supports in house!

Also a picture of special tools we made to fixate the ribs temporarily when outlining and fixing the metal corners and the extra support.