I have to agree with Brad. He and I made and sold leaders at 4 - 5 fly fishing shows a year over a span of 4 years. Brad would furl them on his motor driven board, install the butt end Shorb Loop and set them aside while I hawked our wares and later when there was a lull we would install the Shorb Loops or tippet rings. A couple of thousand were done this way without ever losing a leader.

I think that those of us that used Kathy's method needed something to hang the weight on when hanging them to furl and just left the paperclip in until we finished the leader.