[snwbrdr]

Thank you! Those are ITEM profiles, 20mm. There are several joining options for the corners. The weight without boxes is around 20kgs I guess. A single person can install it by first removing the drawers, then 4 bolts in each corner and afterwards the system itself.
I have reinforced the mounting points as the chief ones aren‘t available yet, I may switch to them later this year. Most important in my opinion are the both front mounts, which are now M8 screws where they mount to the body, under the air suspension tank.