From what I can see it looks like there is not much of a gap on top of the gas tank, so most (if not all) air is flowing under the tank. If so it is lower then the axle already.
Also there is no exit for the air (some my tires but not much) so where would it go? would it not just build up a static layer or am I missing something?
I think I found a second driver so I might just get a video done today