You know, there is a quote-button?
Yes i do, in fact i use it and replace the wall of text with 3 dots to save space, for others to read more easily. As i only reply to question asked towards me.
My answer was about the temperature. Not the ups .
Probably my bad, the temperature was brought up to explain the meaning of "single entity".
But yes u r correct the temperature would be different. Even symmetric setup. Consider building a loooooong connected cores and only insert fuel into one end, the temperature would instantly spread over everything.
Then it become a question if the tradeoff is worth it. If what Yoyobuae wrote is correct then it might not worth.