Ive got a pretty DOPE setup.
listen to this boys, its basically the same setup all of you are using.
ive got 2 12v computer fans running off 1 9v battery. All are under visor, nothing on strap or anything.
The real kicker is ive got this tiny momentary on/off normally off switch i rigged up. (its from radio shack) I rigged it on the bottom left of the mask, in one of the holes of the flex 7 bottom part. You can hardly see it, but all you do is push switch for 5 seconds and fog be gone!