Thinking out loud because I’ve never done this or even heard of it, wouldn’t tying anything to the back of the rap would ruin the action completely? Wouldn’t you want to tie a 3 way on about a foot or two above the first rap with a longer lead than the first?
I suppose that would be a nightmare for getting it in the water without tangling but I’m just having a hard time imagining a line tied to the back of a rap doing any good.