This is the oddest thing.. I just replaced these strings not too long ago and that screw was there.. it had to be.. I never did a setup on this bass when I changed the strings and I was getting a lot of buzz on the A string so I figured I'd take the time today to do it .. I discovered that screw was missing when I went to adjust intonation on that string.. I have no idea when it came out or how.. The screw is nowhere to be found in the house or in the case and with the strings on there I don't see how it could have backed out on it's own.. Very odd... Are those screws standard or will I have to go to the manufacturer.. ? How will I know if this will fit?