Multiple select gates in association with non-volatile memory cells are described. During the heating stage and performance at the highest temperatures of the thermal cycle, second phase particles are dissolved and segregated elements are distributed in the metallic matrix, while during cooling and temperature equalising steps of the slab in the furnace a controlled amount of small second phases particles are more homogeneously re-precipitated from the metallic matrix. The rotor further includes a first blade coupled to the first structural member and having a tip end spaced from the shaft at a second length that is longer than the first length. Again using the received data, one or more of the selected prefabricated elements is customized.