Not an NV, but I have sent back three CCF reels for the same problem. I don't know what they did to the reels, but 2 of the 3 still made the same noise/vibration (when pulling out line) after I got them back. I sold the reels shortly thereafter. Most of my buddies' Nautilus reels make the noise as well. Doesn't seem to bother them as much and it doesn't seem to affect the performance of the reels. Sorry I couldn't be more help, but that was my experience with Nautilus reels.