The suction pad seems a strange solution though, mating to the bare metal of the rear deck. I wonder if extending the rear deck rear hinge would be better (with suitable bracket)?
Or maybe what is really needed is a replacement rear deck with flat top and lugs i.e. Built in luggage rack!
Or Don's alternative using the roll loops only!
http://www.bleazey.co.uk/M3W.html#luggage
