I have always believed the design concept that a wing produces more lift on the the faster-moving outboard side. Thus, as I see it, the engine is placed on the true center of lift, which is about a inch or so outside the center of the wing.
The wing panels are equal, but the body is located outboard, astride the center of lift.
If the center of gravity is NOT aligned with the the center of lift, a rocking or hinging action ensures.
While this problem can be solved with tip weight, an offset body is more efficient.
I don't just make this stuff up. I am in agreement with the great combat and stunt designers.