Ciao From Italy! That nylon cord si vetusto good but si difficult ti feed in smaller head like the one in the video, it works better if you feed it bumping the head before it gets short too much. When cutting close to steel rods slowing the speed help to avoid break the line. I can advise you a new line head from makita engineered in Italy: is called “EASY WORK”, it is compact for battery machines and holds bigger lines, you can reload it without opening! Great video!