Dang, I'm almost more impressed by your pump housing than your control box. Those are both excellent solutions to mobile brewing and this sort of setup looks like it'd be useful for anyone who does communal brewing and/or plans on moving around a bit. Do you find that your fans in your pump box provide sufficient airflow for continuous operation or do you stick with transfer usage duration only?
I have a pump in a toolbox. No fan. I drilled some holes on one end. I've run for hours without an issue.