I may be late to the party here, but has anyone ever noticed that each and every machine bears the mark of the cauldron that manufactured them?
Caldron PSI refers to a basic mark given to basic machines like grazers and watchers. It is also already programmed into the corrupter node that Aloy harvested from the first corrupter she encounters and you have to find every other versions in cauldrons.
I did not know that. Sorry for the misinformation everyone!