Some stuff from the production line...

I used to scan and produce reproducible CAD, it's not that easy.

Scans are only so good, you have to go in and fill holes and repair scan defects. if the object being scanned is reflective you have to spray it with a coating which adds thickness albeit small. Small features can be obscured. Features that end up being shadowed by other features are not in the scan. Flat surfaces are far from flat.