Thank you Gary Ferrari.  You have indeed clarified a few points.
  Since this stuff is just spreadsheet arithmetic reckon why CAD vendors
can't incorporate it into our software?  When I create a library part
I'd input the lead min/max and it'd calculate my hole and pad size based
on what class and level I've selected.  Then after placement in a design
it would minimize the number of different hole sizes as much as possible
based on 2222 table 9-3.  Or maybe the library definition would only
include lead size and the holes and pads would be calculated in the
design.
  Ain't I lazy? But that's what we have computers for isn't it?
George W Uptain, Jr.
Austin Product Center of Schlumberger Oilfield Services
(512)331-3183

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