You've pretty much nailed it. But I would keep an eye on the resistor. If the fan stops working, you can't hear or feel air moving out by the cooling fan, then chances are the resistor has burned out. This means you ought to try a higher tolerance rating in Watts power. For example, if you installed a 1/4-watt or 1/2-watt resistor and it blew, try using a 1 watt or higher. You can also experiment with a 50-ohm resistor if need be.

73s de Phreakout.