I'm not going into the whole leadcore debate as everybody has thier own opinion on its use, what i would say is if you are using it don't buy the ready made leaders, they are looped at both ends and will not eject rig componants.Buy a spool from esp, fox etc.You will also wany to buy a few drop off leads, these will come off on every take when set correctly. also splice your mainline to the leader do not use a loop in the leadcore as this can prevent rig componants being ejected.