So I'm trying to make myself a tarp ridgeline and I'm running into an issue. I'm using 1.75mm zing it. My prusiks aren't holding. They hold to a point then start slipping. Can the zing it be prusik'd onto the same type of line? Or should I be using a larger line for the ridgeline and smaller diameter for the prusiks? I'm using 3 turns. Would 4 help?