Quite a few years ago, Stephensons made a version of their 2R out of a mylar spinnaker fabric very similar to cuben, even in looks. It was called the 2Z, the whole tent, double wall with poles weighted 1 1/2 pounds. A friend of mine owned one, it finally tore a tiny bit in a severe wind storm, but he just taped it back.
I dont recall the type of tape Jack recommended, but they would probably discuss it with you.
Does anyone here remember these tents ? It was sold in the early 80's.