Mono to leader with barrel swivel it's fine some guys like to squeeze the end of the barrel swivels to oval shape so it goes through the eyelets a little easier. Personally I like to use back to back uni knot Spro swivel snaps coastal snap or dual lock for leader to spoon .I use a Albright knot for leader to copper. Copper to backing . You will have to experiment to find witch one works best for you . Tying knots to barrel swivels is pretty easy knot tying improved clinch knot. Sent from my XT1609 using Lake Ontario United mobile app