I think I the trick is to get the tunnel as tight as possible so that it does not touch the sides of the van - easier if you are attaching via a Fiamma type awning as the attachment is further out from the van.What has everyone done to stop the awning marking the van where it touches the sides?
I have a Vango Hexaway and the first time I used it it left a few small scratches.
My plan is to use some vinyl temporarily whilst camping or try low tack tape.
Any other suggestions?