Our van has very little storage for things like chairs etc and I happen to have a roofbox in the garage that will fit. When we bought the van the previous owner said that he took a roofbox off as there was only him and his wife and he didn't see the need for the extra drag. When I have had a look on the roof there seem to be some self tapping screws in the holes where the old box has been removed. Now, the question is, do these roofboxes just get srewed to the roof? I guess there is some kind of plywood underneath the fibreglass panel, but even so this seems a bit 'weak'. Any help welcomed.