Hello. I have a 34" 5 string RockBass I recently fitted with D'Addario chrome flatwounds, and the low B intonates too sharp. I don't remember how was it like with the previous set of Elixirs I've used, but it's possibly been even worse as this low B is .132 while the Elixir was .135. Anyway, there are springs that are supposed to keep screw holding the saddle sitting onto the bridge, and with as much scale extension as was allowed with the spring the low B was still ~25 cent sharp at the 12th fret. I cut a little over half of it and now while the saddle is 1.5-2mm away from furthest back, the 12th fret is sharp at about 10-15 cents (it's a bit hard to tell as the tuner somewhat wobbles at these frequencies). Anyway, is there any reason not to remove the spring completely and take the saddle all the way to the end of the bridge? I doubt even then it would be enough but I guess it would be slightly closer.