Is a 1"square slug a real simulation of an IHS equipped core? I would highly doubt that there would be heat dispersal more than a couple of mm from the edges of the core itself, let alone homoegeneously throughout the 1" square.
IHS's are to protect the cores from poor installs, not to 'spread heat', despite their name.
I would think that the T-bird simulator is most accurate of the three he uses. Is that the consensus from the gurus here?
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