HI. I have a 5 string, and don't find myself using the B string all that much except when play a song in D, and even then it is much more bothersome than just having a D string! So what i want to do is replace my low B with a D! I was wondering what gauge the D string gauge should be when using standard .045 or .050 string gauges. Also I don't want the D string flopping around, so if a set of thicker strings are needed so the D string will fit in the nut, let me know!!!