That's basically what the OEM opperation is, a thermostatically controlled switch... might as well be able to adjust it too. And yes, I'll keep my manual on/off.

Since I didn't know what conditions turn on the Auxiliary fan, I opted to be able to have total control. I like it better that way, because now even when I pull into a gas station (all two times since I've had the fan in), I let the fan run.

I plan on following up with some simple comparisons over the factory manual unit. Such as fuel economy and basic info about the fan (as soon as I can get them).