Dear flats users, I few months go I took some D'addario 45-105 off my AV57 Pbass to install Labella 760FL strings (43-104). I immediately noticed that there was some unusual string buzz after 12 to 20 frets. I shown my bass to an instrument maker and he said that my neck was twisted! And he found out that the angle of my bridge was not 90° anymore. It's a bit crooked. I said: no way! I've used all kind of strings on it and the action is ultra low without any buzz. I have all kind of 45-105 rounds and TI Flats. I said: ok let me try it back with classical D'adddario 45-105 round wound strings. I let the bass rest 2 days and the neck was back to it's original perfect shape. Either I got a bad set of Labella 760FL that was not tension / balanced or Labella are not for my bass. I'm a bit stubborn and I would like to use my bass with labellas so I bought a different set of labellas, the 760FS. 760FL are 043 - 060 - 082 - 104 when 760FS are 045 - 065 - 085 - 105 which is a more common gauge (even if flats tension is always higher compared to same round gauge). My Fender AV57 P-bass is actually set with d'addario 45-100 Chromes and works perfectly. Except I miss the Labella tone Do you think I should try this Labella 45-105 (760FS) and experience Labella pleasure? Or do you think my bass won't like it better than the 760FL and I should forget about higher gauges on that bass. Are Labella 45-105 really more stiff than D'addario 45-100 chromes ?