I just put a new set of flats on my fretless Stingray 5 (finally found a flat low B! they sound awesome) and my new E is rattling in the nut. I'm not quite sure why, because although these are fairly light strings (.95 E), the strings that the bass came with also seemed pretty light. By eyeballing them they look like they are pretty close to the same gauge. I immediately thought it was just a buzz on the fretboard so I started messing with my action, but to no avail. I decided to put pressure on top of the string where it crosses the nut, and lo and behold, no more rattling. As a temporary solution I stuck a very small scrap of construction paper partially underneath and partially on the side of the string. It seems to work fine.. the sound is unaffected and so far I haven't noticed any problems tuning the string or with the string going out of tune over time. Is there anything wrong with just staying with my paper solution? If so, is there anything better I can do short of getting a new nut? If I do have to get a new nut, what do I have to do (probably better phrased as: how much is it going to cost me for someone to do it for me? ) ?