From this, I can only assume that the standard uncalibrated PID is set to a temperature level that the SC5 never reaches, even on repeated restarts. That said, I can tell you the button area was getting quite hot near the end of all those re-starts. Using an infrared thermometer, I clocked surface temperatures at the base of the head as high as the low 70 degree C range shortly before output reached the typical H2 level.
I just checked my SC62, and surface temp on that light (uncooled) with multiple re-starts stayed in the low 60 degree C range. But you could see the effect of the PID kicking in immediately to drop output (which meant I had to keep switching for H2 and back to H1 very frequently to try and keep the temp/output up).
Out of curiosity, what is the maximum temperature reached by the SC62 if you run it on max and allow PID to do its thing? I presume it's less than 60C, but is it higher than 50C ?