Thank you! And such a beautiful layout, nice to read!
As an owner of some Creo high end scanners (and a drum one), and based in Saint-Petersburg, Russia i often feel myself, when scanning a big batches, in a kinda sweat shop in an emergency nation )))
To get back on the topic - seen here an interesting opinion, that the scratches and dust on the base side on the film in the collimating light get projected thru, and seen on the image alongside with the all the dirt from the emulsion side. So. Drum scanners use a collimated light source and i do not seen this effect on “projecting” when scanning on the drum scanner. Maybe this is because originals are wet mounted. Meanwhile. I do see a scattering and flaring on the various edges in the image, when scanning on the flatbed, specifically from diffused light. Thats why flatbed scanning always need a sharpening.