Syn...I'm sure that what you're doing is really cool...but I don't understand any of it.
I just hook 2 fans up in parallel and connect it to a 9v battery, with an ON/OFF switch interrupting one of the power lines.
A new battery lasts about all day (i.e. I've never drained a new battery at a game, even when it's been on for most of it) and even with 2 fans (the ones from Active Surplus) they're really quiet. Just loud enough to know that it's on, but not distracting or audible to anyone else.
I've seen Don's momentary switch setup...is that what you're doing?