I originally posted this in strings as I thought it was a string issue. I had my bass into a well-respected bass tech for fall setup and restring from GHS Boomers to Status Graphite half-wounds. Prior to the setup, this bass was tonally/sustainally consistent across all strings. The B string came back with reduced sustain -- sounded like a year old flat. I assumed it was a bad string. I replaced that B string -- same result. I put on a set of Ken Smith Slick Rounds. Nice sustain on all upper four, definite lack of sustain on the B string. I have to take this back to the bass tech. All these new B strings are .130. I don't know if the original GHS Boomers were the Light medium .126(.128?) or the medium .130. What could be causing this? Could it be a seating issue? I want to understand what's going on and I need to get this corrected. I assume something changed as it wasn't a problem before. Help please.