Over 20 years ago Tournament Cable developed the "Double Wall Splice" which has been adopted virtually by all when splicing line into hollow core.
Wind-on leaders completely eliminate the need to hand-line excessively long leaders when the snap swivel reaches the rod tip. A Wind-on leader when properly attached to the main line coming off the reel by the loop to loop method gives you the ability to have the longest leaders and not have to worry about hand-lining. The Loop to Loop connection will easily pass through the guides allowing the entire wind-on to be reeled directly onto the reel.
A standard snap swivel is attached to the end of the 25ft wind-on leader. All of the leaders connected to the baits or lures can be shortened and then connected to the snap swivel. Now when the swivel reaches the rod tip there is only a very short leader and the fish is boat-side. It's a lot easier to control a fish from the end of the rod tip than handling long leaders and it's much safer.
All of our wind-on leaders are 25ft and spliced into hollow core braided line. Over 20 years ago Tournament Cable developed the "Double Wall Splice" which has been adopted virtually by all. The all important Serving is done by hand using waxed line and finished with a type of super glue.