I've never really noticed that my 2300c runs hot, let alone even warm. And yeah, I've noticed that if I take mine apart right after running it for a while, those little transformers are practically the only things that get warm in there.

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That's the sort of info I was asking for. Adjusting the heatsink helped tremendously, but maybe I still have a problem, as the whole "top left" really is noticeably warm. I have also found since my previous posting that the 2300c is not charging batteries properly. Capacitors?

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How did you "adjust" the heatsink? Perhaps since things are rather tight in there you're accidentally crossing something preventing the battery from charging properly? Check a bazillion times to see if anything's touching anything in there. Also, I've noticed on both the Duo boards I have that those little transformers seem to whine a bit. Do yours whine?