See if I can make this sound doable.
Step 1: Need pliers from Carl Shoupe.
Step 2: 1/16 & 3/32 brass tubing(copper walls are too thick) run through torch to red hot, air cool. I sand the black residue off once its cool enough to handle.
Step 3: Cut 1/16 to 1 1/4 or 1 1/2 inches and 3/32 to 1/2 inch.
Step 4 Bell crank drill out holes for tubing and bevel edges. If doing just the cable ends you need 1/8 rod to bend tubing around.
Step 5: Slip lead out or cable through 1/16 tubing far enough to have some to work with, I go about 4 inches. Slide this into the bell crank end, center it and bend. Now you know why I use 1 1/4 inch or longer.
Step 6: Slide 3/32 tubing over the cable. You did put 3/32 over the cable first as I for got to say. Take loose end and feed it back through the 3/32 tubing. Now you know why I leave it long. Once through the tubing pull it up snug. It should push the 3/32 up to 1/16. There should be a little be a little loop showing right at the end of the 3/32, May not show in pics.
Step 7: Now you start swagging the tube with the pliers. With Carl's pliers there will be a little bell at the end of the 3/32 tubing. On lead out cable there should be enough cable that when you have swagged the tube the cable will not move. On flying lines I cut scrap pieces to go into the 1/16 tubing with the line to help fill space in the 3/32. The loose ends of that will also go back through the 3/32. If you don't, with .015 lines or less you will never get the tubing swagged tight enough.
Step 8: Now pull on the cable as hard as you can, If it slips you didn't put enough muscle on the 3/32 tubing. You have to go around and around the tubing. I even turn the pliers over in my hand as some times it seems it doesn't swag evenly. Once done and you are happy, bend the loose ends up where you can cut them off. Yes when you put a line clip on they will stick your fingers, but I haven't drawn blood yet.
As any thing it takes patience and time. What you see in the picture took about 30 minutes. I can make a set of lines in the time it would take me to wrap one line. This has been pull tested to 75 plus pounds in competition and on .018 I would not be afraid of going 100 pound pull. Now Carl is a member on here and is a busy man so if you PM, E-Mail or call have patience.
Okay I've reread this and now wish I had paid more attention to my English teacher.