I recently raised my action and the lower three strings now feel great. The G does not feel like it went very much higher though, and this is especially noticeable in the lower positions. It also rattles a little when I pizz it too hard and the tone is thinner than the other strings. I slid a business card under the string near the nut and it is a tighter fit under the G string than under the other strings. Do I need a new nut? Would it be an okay temporary solution to slide a bit of chamois cloth between the string and the nut to raise the string up a bit at the nut? Or should I get my luthier to make the fingerboard lower where it meets the nut? Thanks for any suggestions.