I'm using the 1.75 mm Dyneema from Warbonnet Outdoors, and I'm trying to make an adjustable guy line for my tarp by finishing with a prussic. The problem is that it slips on this material. I even made it a triple, but it still slipped. I'd love to study someone else's setup; if you have pix or a video, I'm sure I'll find what I'm doing wrong!