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I have the V.2 kit and this is what my controller looks like. I have no fan. And I live in Florida where it rarely gets below 90 degrees. I've never had any thermal issues at all. In fact today is the first day this summer that it's less than 90 degrees (it's rainy and 73 degrees) and you can really feel the difference in power. It's amazing how much better this thing works when the weather is cool.
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