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I discarded cooler1 - some reason, the heat from the hot side was transferring through to the cold side and negating! Not sure why or how, seeing I had a heat sink with fan (sucking) on the hot side and a big radial hat sink on the cold side.
Anyway, redesigned it, using plastic this time and high density foam. Using nylon screws too. See how that goes when I have the time.
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