I'd definitely narrow the front end, so that air would not be spilling from the front to the side, and get the front and rear stagnation points closer to level. There's not enough air feeding to the bottom of the tail to maintain attached flow at that angle. The cockpit area looks ripe to perform mischeif, too. A classic small flat racing screen would leave a big wake.
Recently, I've started imagining the thickness of the boundary layer on individual components, based on cd, and it has been very interesting. The eye might disregard a thin brake line among streamlined shapes, but it might be making as big a hole in the air as a much larger streamlined wheel pod.
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