i do it all the time you just have to wind spring w/ thumb and index then insert bent end in is littel holder . I usuall wind it tigher than needed so it can sit with some gap so u can clamp it with needle nose and put it in then i pull the middle out enough wher i can slide it onto the disk the string sits on then push it in while turning the disk to wind the spring up as u wind it the spring will fall all the way into place. it takes patience but it does work. im trying my best to explain but post if u have any q's