I made my own much like the ULA's gravity setup, but lighter. Works great so far. I mostly take it when I'm backpacking with a few people.

JFF

http://farm4.static.flickr.com/3005/3085825052_ce2eb37ab4_o.jpg

http://farm4.static.flickr.com/3184/3084986023_febaef6c95_o.jpg
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