Electric Fans, can they replace my clutch fan?

I should have spent the money on the Dakota Digital controller it has a few different switching setups that have a soft startup. It's a really good setup. Right know the way I did it is fine for me. What kind of radiator do you have. I was going to tig weld the brackets to my radiator and through bolt to the shroud but will just through bolt to radiator. My last fan I just used the radiator zip ties but my buddy that owns a radiator shop said that is the worst thing to do to your radiator.