Al--
       I beleive that you may be in violation of MIL-STD-275E section 5.6.4
   depending on you plating requirements. Along with that, it is also important
   to consider the physical location of the pwb with respect to the end 
   product - is the chassis, casting, etc in physical contact with the the 
   plane, and is there any electrical problems??? IMOA, cut the plane back from
   the edge of the board-- end of story!!

                                 Bob Vanech  [log in to unmask]