Not sure of your experiences with electric fans but I have always run one and never had an issue once with 2 different engines and the second one has a pile of power. I think this applies to most people's issues on cars......they hope that a 19.95 fan will work in place of the 250 dollar one they really actually needed.
Well I have had 3 cars with electric fans 2 BBM and one SBC all had Spall fans and custom shrouds all had slow speed over heating issues. At highway speeds no issues. Not even the Spal Rep on the Power Tour could figure it out.
On the other side of the coin all the cars I have owned with a mechanicial fan never had issues. Im glad you have had some success, for me never again.