I introduced a problem in my 4-string Jazz bass when I installed a set of Rotosound 88s and had to enlarge the nut slot to fit the larger strings. The A string buzzes similar to what fret buzz sounds like, but if I fret the string the buzz goes away, I am 99% certain the buzz is from a problem at the nut. I am not sure if it is that the nut is cut too low or if it has to do with the break angle. I am wondering if you can enlighten me on the effects of the wrong break angle and what should I be looking for? I have plenty of length on the string as I always err on the side to too long, but I will look at my wrapping more closely, it is possibly too high. Before I filed the slot to enlarge it, I put graphite on the bottom of the slot with a pencil and I made sure I did not file all of the pencil mark away, I don't think I lowered the slot much if any, I get more than a credit card under the first fret when I fret it between the 2nd & 3rd fret. I have the same clearance on the A string as in the low E which does not buzz at all. If I push lightly on the string behind the nut the buzzing goes away, this makes me thing too low nut slot since by doing this I am technically increasing the clearance. I also did "resolve" the issue by placing a piece of paper under the string at the nut folder twice. This also would indicate a nut cut too low, but I am not sure. I replaced the nut on the bass a few weeks ago with a Graph Tech TUSQ XL, the old one from fender was quite beaten up and sustain stunk on the bass, after replacing the nut sustain improved tremendously with the old Chromes I was using and I had not buzzing issues. The nut slot is not too wide, this particular string is 100 and I used a 105 nut file, I don't think sloppiness is a problem here, but it is possible. I would greatly appreciate any feedback; I am pretty handy with tools and have been doing my own setups on guitars and bass for a long time, but this one has me stumped. BTW: I like the sound of the Rotosound 88s a lot, I think they are staying on this bass for a while. Follow up: I searched again and found some threads about this problem; my apologies for the repeated post. I don't see a way to delete it, if you think it should be, please do that for me?