the type of line for a drip line doesnt matter, anything will do. it isnt a "wick", its just a barrier for the water to hit and go down, so wicking isnt required, its a pysical barrier which lets the water go down the point of least resistance. line is tied just inside the tarp on the ridgeline (assuming the tarp is over the ridgeline) and just knotted with any old knot. you only need a couple of inches of line hanging vertically and bob's your uncle.