Doc, I'm always fishin'...The first thing i do when i get a new tape is to trash the container, and make 3' dia. loops thru 3/4" or 1" flex. I'll wrap electrical tape around this for insulation. I've used those springy leader lines, there ok on a long run where there's a 90 some distance away. For shorter runs into a panel i'll fish with 1/4" nylon tube,which a mechanic turned me on to. For unoccupied runs back to a live panel i'll screw on a threaded coupling with a hole plug on the end.