Mine in the XG does fuck all too, but works enough to stay cool. Got EL thermos to smash in when I can be bothered. Which could be months.
Why are people scared of wiring? Fans need power and a ground to work. Switch the power with a relay triggered from a temp sensor, switch or one of those davies craig style controllers.
I'd use a factory style switch, do XFs have a spare spot in the head or therno housing for one? Then its all factory style and neat.
I think you have to cut the excess snout off the water pump shaft.
Its worth it just to lose the gay sound, might gain a bit more response from the fan not hanging off the pump?