Double Bass need nut advice

[flat five]

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.

 

[Martin Sheridan]

Sounds like you need to have the fingerboard planed, and have your luthier check the string height at the nut and end of the fingerboard at the same time.
Martin Sheridan
Bass Maker