I am sort of convinced the aberration is a scratch on the window, because I can locate it at at a shallow angle; I couldn't tell before if it was behind, on, or above the window.
The window is not loose, rock solid in fact, so the defect won't jump around. I attached some pictures of the beam...
I just received an s06j diode and copper module, and I think I may have scratched the window with the tension spring. Did I scratch this or is this a defect from sled scavenging? How common are scratched windows? Did I just join an exclusive club?
Looks pretty awful and the defect is amplified...