[javcasas]

> It would be crazy if in an auto factory people were measuring to make sure every angle is correct

That cannot be any furthest from the truth.

Take a decent enterprise CNC machine (look in youtube, lots of videos) that is based on servos, not the stepper motor amateur machines. That servo-based machine is measuring distances and angles hundreds of times per second, because that is how it works. Your average factory has a bunch of those.

Whoever said that should try getting their head out of their ass at least every other year.