Typically, a drilled feature to artwork feature tolerance of
          +/-.005" is achievable when fabricating a board, using
          standard processing.  At HADCO, we have done some volume
          work with a requirement of +/-.003" from tooling hole
          (non-plated) to fiducial (artwork) by using glass artwork.
          Your NRE will be a little costlier here, but processing
          should allow acceptable yields, so as not to adversely
          affect the basic price of the board.
          Tom Coyle
          Field Services Engineer
          HADCO Corporation
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          P.S.: Boards were inspected using a View Precis.