Too much stretch; Too much bulk; Too much weight.
+1 on this...
Yes, it requires that I used an extra fifty feet of cordage per tarp, but everything is grab and go and comes down just as easily.
I use snake skins on both tarps, and both use split ridge lines that stay attached via mini-ucrs. I can't find any issue, nor can I find an easier way to do it. Maybe a CRL is more complicated, but I don't think so.
Bookmarks