According to Aqualung, their Supreme regs are "Specially adjusted to resist freezing." I have found some reference to this being a change in the MP adjustment, but I do not understand how this impacts freezing or "performance" of the regulator. Also, could one not simply make this adjustment on a non-supreme reg and accomplish the same thing? I gather there is some reason one would not want a regulator adjusted this way if not diving in cold water. Any help?