i have watched 4 climbers from 4 dif outfits.only one of them used a rope of anykind.now this is for a single tree take down,skin the tree on the way up,drop the top 15 to 20 feet.and cut the chunks on the way down.one guy repositioned his line just below the cut , and did this for every cut, [2-3 feet.]now if you are spiked in with a flip line,is this normal.k