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I think a nicer way to represent the rating would be for the hubwheel itself to change colour. Then you wouldn't need loads of little 'thermometers' over the interface.
I'm afraid that would require too much interpretation to read/understand easily, and it would require you to circledot a post to give it a "temperature" as well. And the point of the temperature is the poster asking for feedback about the quality of their post/position, without requiring you to circledot it.