MichaelO

It's not my rope trick, I read about it in an early climbing rag, and then watched some brits doing it. Taking a fall on a single twin isn't bad, it's a very soft catch, but the stretch is scary. I would definetly suggest the mammut infinity though, it's been a great rope.

Another handy variation using two twin ropes: If you don't know whether your going to make the clip, you only grab one of the lines for the initial clip. The advantage: if you blow the clip, there is less slack paid out on the non-clipped line, it shortens the fall. After you firm up your stance, you grab the second line and clip it in paralell to the other line.

Ken4ord Yep, you are correct. I was envisioning the expander as being wider and going on the bottom, with the idea of using the insulation of the bag on the top. On second look, it appears as though two sets of feet are going to end up compressing the insulation in the foot-box. It almost looks wide enough in the photos to have your shoulders clear of the zipper. I wouldn’t mind the zipper under my leg if it meant that I could have the down on top of me. I might have to try one out.

8 1/2 caddy shack Dead Ringers

Check this out. http://www.backpacker.com/gear/article/0,1023,3890,00.html Buy one wonderfully light mummy bag, and sleep two. I don't really know why it has to be insulated though.

The Integral Designs Sil-Shelter has worked well for me. It has a lower and more stable profile than the Black Diamond Beta-Light. It also has more usable guy points. They have an optional bug net as well. It’s done year round duty for me and been very pleasant. I also have a hammock, you should give it a try.