Just changed an E string for the first time (a Golden Slap to a Rockabilly) and got there eventually, but in the process of installing, the very end of the string started to unwind a little so I now have about an inch of metal winding sticking out the end. Is that normal, or have I inadvertently ruined the string before I finished fitting it by setting it off unwinding its core? Thanks for any opinions, sorry if this should be in Setup and Repair