I bought an FBass in Feb 2000, and it came with stanless steps. I wanted to preserve the frets and Jimmy at Guitar Boutique said to try Zon UltraSonics. I love them. The B is wound with wire the same diam. as the E. They last me 4-5 months EASILY. They go very slowly, so you don't notice it much. I tried a lot of others on my Musicman 5, but I don't even want to waste the chance to put a new set of Zons on.