I had planned to make a (mostly) symmetrical "original" version of Han Solo's M68 (Ford Falcon reference) Landspeeder, but then I started looking at more realistic toys as well as official renders and one of the full-scale movie props.  As explained in this video, I realized this vehicle was likely never intended to have been symmetrical in its factory-stock form.  So, I built upon what the evidence suggested.

Video - LEGO Star Wars Han Solo Landspeeder MOD: Original appearance?