I’ve tried the Contour fans, a large Derale electric fan and ultimately I went mechanical on mine. The electric fans worked ok. The Contour fans blocked airflow on the freeway so she ran a little warmer than I was comfortable with on the longer runs in the summer. The single fan didn’t cover enough of the rad so in stop and go traffic she ran warmer than I liked. In neither case did it over heat, just warmer than I was comfortable with. The mechanical setup has been great.