Electric fan controller

I run the hayden controller, easy to set, kinda clunky looking though.
Pauly have you thought about running your controller off of a relay that only sees power when the ign is on? I know it wont cool the car when it's off, but neither did the stock fan setup. Or maybe a time delay relay, check this out. Adjustable from 2 sec to 5 min...

That's the setup I'd like to have. the bussbox that is pictured between the MSD box and fan controller are my relays. It was my understanding that the Flex-a-lite controller shut the fan off 30 seconds after turning off the ignition, which would be ideal.
I need to review the controller install directions and make sure there isn't a way to achieve this. Otherwise, I may just put some kind of timer inline between the relay and the controller since it wouldn't involve a great amount of wiring disassembly/assembly- done that too many times already!