The strings are wider on the End so you don't need to put any washers. I did have to open up one of the holes I believe it was for the D string just a little bit. When I put the strings on I pulled them through the tuner slot tightly then held that spot with my finger and put zip ties on the string at that spot.When I strung up I just passed them through the slot and the zip ties Held them place and then I would tune it.