Thanks for the fast reply. I dont suppose you know whether a bracket exists to mount the Thule Omnistor 4900 to the Reimo Multirail without drilling holes in the van? If not then the DV100 sounds like what I'm looking for.
Well - I looked for a long while and did a lot of research, and this was the best I could find. They either need holes so you bolt them up, or they are bonded and cannot be removed at all. If anyone knows different, then they're keeping it to themselves ! Bottom line is that the awning is pretty heavy and puts a lot of load on the mount points.
One thing I would like to have investigated would be to make a bracket that uses the Reimo rail (or Multi Rail) and then goes over the top to the vans factory roof rack points (or the optional rails that go in the same place). This would see it securely bolted, and not in contact with the van body at all... Maybe when I get time I'll look at prototyping something, but right now it does not seem to exist.