Just got a used Starrett 98-4 precision level which is accurate to
..005" per foot. How do I calibrate the level? It has a screw on one
end that holds one end of the level and a threaded stud on the other
that hold the other end of the level. The level is held captive on the
stud in between the nuts on the threaded stud. Mine was loose when I
got it and I need to know how to get it back in trim and check it for
accuracy. Thanks, Steve