I'd like to echo Don Vischulis' and Dave Pizzoferrato's
          comments regarding this thickness issue (Don: I think the
          only place for measuring that you may have left out is "over
          the connector fingers").  I see a couple of issues here:
          1) Place for measurement is critical.  Make sure the
          fabricator knows.  Please give us your finished
          requirements.  What the board measures before plating is of
          no consequence to the end user.
          2) Everything in life has a tolerance.  To complain that you
          want boards that are 1.55 to 1.60 mm (.061" to .063") thick
          and you are receiving boards 1.70 to 1.77 mm (.067" to
          .070") thick is unrealistic.  State your nominal finished
          thickness requirement (ex: 1.57 mm or .062"), where it is to
          be measured, and allow a tolerance of +/-10% on 2 and 4
          layer product, or +/-12% on 6+ layer product.  Work closely
          with your board fabricator, and over time these tolerances
          can be tightened through experience with fabricating that
          part.
          Regards,
          Tom Coyle
          Field Services Engineer
          HADCO Corporation