Awesome, glad they helped :).

It's a mixture of techniques. Using fully rigged CAD models is a huge help, it ensure physically realistic motions. Then, I built a custom exporter / renderer to render them realistically in CAD style.

For a lot of the animations, I first develop storyboards to cover the main beats, and decide on what would be interactive or not. Then a lot of iteration with Fable (and Opus 5.5 now!) on how to show things clearly. A lot of time is spent trying to show the key ideas visually. Eg. in the bench micrometer adding an overlay with the size of the micrometer closing over the part, as well as showing the screw spinning was a big improvement in "readability".