Just for curiosity's sake: I've only seen one SL3 (non SWM), one SL3 SWM, and one SWM8. But the temperatures of operation of the three are quite different. I never detected any heat from the SL3 (non SWM), the SL3 SWM runs a little bit warm and the SWM8 is almost, but not quite, hot. Why is the SWM8 so very warm? Doesn't the heat tend to damage the electronics of the SWM8? If an SL3 SWM can operate so cool, why doesn't a SWM8?