I am setting the DC on the side of the tree, not the center. I will try flipping the DC upside down if that reduces chafe.
Since several of the times (4-5) that this set has been used was in my yard testing the set-up was on the same tree in the same position so that could be a factor.
Does the amount or wear shown require me to replace the straps? At this point I am planning to unless I hear that I am being overly cautious.