you know but you use it you have to ask a lot of questions that lead us to believe you need a lot of help but yet risk using leadcore which you probably dont know how to use in a safe manner (which there aint really a safe enough way of using it) why risk it? if you must use a leader of some sort then why not just use tubing?
i used to splice my own leadcore leaders and really do my best to make sure they were safe but i will not use them at all now, and also most decent carp waters dont allow them
just as a footnote to NIDGEWOODCOCK`S post, i absolutely agree about staying away from complicated rigs, most of the time a simple no knot hair rig will do the honours but by all means learn to make the complicated rigs for when you might need to use them
Raptors and the fox all very good, a while back i bought some cheap hooks of fleabay and i tried one on a surface rig, it snapped after i caught it on a small branch, binned the lot!