Credit for the Petzl goes to Sean Nordeen who posted the link! Sean also has his own web site, he hiked across Zion National Park this Thanksgiving (06). It's a good read, I followed his log with a topo map opened up. http://www.hiking.lifesadventures.net/ZionNPTransverse.htm <http://www.hiking.lifesadventures.net/> So Thanks Sean, armchair