the old leader argument!! jesus wept. we are fishing right? we are all so concerned that leadcore may damage a scale (no more than line does if at all) but its perfectly fine to trick a fish that is trying to eat to survive and drive a piece of sharp metal in its mouth, drag it 100 yards across its world under extreme stress, lift it out of its world and start the suffocation process, pick the fish up with your hands and burning it, blind it with flah photography then put it back!! oh but its ok you had a barbless hook and no leadcore and you did use ur klinik !!