I have crank windows, so the driver's side one is the only one I can really adjust om the fly. Like I said earlier, if it's hot I usually have the window down an inch or so--just enough the get some fresh air blowing over my face. In pure theory,you might be right about "balancing" with both windows. but I've got a vehicle that weighs over 3 tons, so I really don't think it matter for me
