Glenn, you are correct. The current design is all within the assumption of the existing curved shell shape and door sizes plus optimizing aerodynamics. They also could have provided more space for a retractable window, though that would have resulted in a bit of a modification to the shell curvature. The shell shape and window location is optimized for aerodynamic efficiency and they want to keep that design criteria fully optimized even if it results in issues with the side windows. Over a year ago, a forum member (loswa) proposed some alternatives of varying desirability (examples below), though it is unknown if the Aptera team ever looked into these and other alternatives to get rid of that mid-window frame. Going with a solid, single piece, non-retractable window (or Peter’s bubble door concept) would actually be even better aerodynamics with no frame/seal turbulence at all, reduced parts, reduced cost, and reduced weight, but it would have the downside of no retractable window (ventilation would be through the interior vents).