Originally Posted by rbinhood
I have one of the original models. I think you have to use a separate tarp if you are going to use an under quilt.
Otherwise, as somebody else suggested here, you might make a waterproof sock for your underquilt and attach the quilt inside the sock. If you think about the material that goes into making a sock, you might be just as far ahead with a tarp.
Aaarrrghh! I hadn't thought of that!