Dante

Apologies of this is in the wrong thread, it’s my first time on the forum. I have been flying a 1.5 and a vented reflex for a couple year now and am trying to learn new skills. I have seen multiple people have “line leaders” which attack onto the handles and have multiple knots that you can attack the lines to in order do lessen the leading edge and increase the braking. Does anyone know where I can find these or how to make them?