D O 90 After Market ?

ZWD

Here is a GIF of the comparator view.
Not really apples to apples based on differences in focal length and sensor position but you can get a feel for it. This method can give a holistic and intuitive approach to spotting obvious errors. Images that are not orthogonal to sensor also need to be geometrically adjusted to match which adds error and uncertainty.
Also attached is a @Spacefruit bezel and my baseline reference.