*cough*Spent two weeks just with hard.
It took me over a day to get to success, and that was with all your obvious cookie-crumbles!
Quite a feat, Fox
That being said...
I've a NF-F12-5V PWM sitting atop my unit, and it's connected via USB.
There is no foreseeable torture on this unit, and my temps are extremely low.
Did you verify that the MB fan connector is 12v (opposed to 5v, as I had originally surmised)?