Has anyone has any problems with zing-it prussiks sliding? My prussiks use ~2.5 inch continuous loops, wrapped three times. The problem seems to be with the buried ends. They make the loop itself thicker, and that portion doesn't seem to want to grip the zing-it ridgeline as well. I have a Dutch hook that goes around the tree to a prussik, but I'm having trouble getting it to stay tight. Do I need a bigger continuous loop with smaller buries so there is more "usable" line in the loop?