I am in a project that tunes to B. Now the natural thing to do would be to go with the 5-string. But I am not a fan of trying to thump that fast on the thicker string. Is there anything I or a professional can do to the bridge of a 4-string that will get the E tuned down to a B that responds just fine? should I just tune it down and lose some of the sustain or just keep with the 5??