Often after reaching my tip and wanting to advance up the tree I use a long lanyard as a second climb line. I like at least 20'. I have been using 16 strand for its abrasion resistance, since its being natural crotched. It works fine, but then I read somewhere that km III is stiffer, which I also like when flipping up big conifers. (For years logging all I used was a 18' x 3/4 steel core, much easier on hands when on spurs for hours.)

How will kmIII last when used like this? Natural crotches and fir bark can be hard on rope. Should I try it or just by more 16 strand?