code: def mate_top(self):
          " top of the stator"
          return Mate(self, CoordSystem(
              origin=(0, 0, self.length/2),
              xDir=(0, 1, 0),
              normal=(0, 0, 1)
              )f mate_top(self):
          " top of the stator"
          return Mate(self, CoordSystem(
              origin=(0, 0, self.length/2),
              xDir=(0, 1, 0),
              normal=(0, 0, 1)
              ))
docs: top of the stator