An ongoing quest to convert a 914 into an all-electric vehicle. After 2 years and 22 thousand miles, added a chill plate to controller and use water cooling, which makes the controller run much cooler. Had been using a large heat sink with a fan to cool the controller but there were times when the controller got up to 70C. Used a small radiator with fan used on computers to cool the controller and it works great. No need for an automotive grade radiator to water cool your controller.