Gore's Laws of Design Engineering   (NOT-as-in Al)

1.  The primary function of the design engineer is to make things difficult
    for the fabricator and impossible for the serviceman.

2.  That component of any circuit which has the shortest service life will be
    placed in the least accessible location.

3.  Any circuit design must contain at least one part which is obsolete,two
    parts which are unobtainable and three parts which are still under
    development.

    Corollaries:

1.  The project engineer will change the design to suit the state-of-the-art.

2.  The changes will not be mentioned in the service manual.