Have you ever set the intonation on your bass and you run outta screw on the bridge? I was setting up my 5 string and the B string is just about set, but I had to crank the screw so that the saddle is all the way back on the bridge. I actually had to remove the spring so I could take it back a bit further. It's darn close to be intonated, but should it be this drastic of an adjustment? I switched to a light gauge B string (.120). Could this be the result of that change in string thickness? The strings go thru the body by the way.