This describes how to wrap the ends of the lines for Control Line models using copper wire. I used a homemade jig to hold the lines to make it a one man job and easier to do. Repeat three more times to make a set of lines, always make sure you are flying with the right diameter of line for the weight of the model and event you are flying. Check the www.modelaircraft.org website for the rules that show line diameter requirements for each event. Some events require solid lines while other events can use braided lines. Always pull test your lines before you fly.