Surely a leader can be as short as a piece of leadcore? I'm thinking of using some instead of tubing, just a meter or so. With a semi fixed running lead I really cannot see any problems. Taking it to the worst scenario the fish has a meter of line, and hooklink attached. Fishing barbless as I do mostly it won't be around for long. Explain the harm or difference, the line with any rig could break in any place?