As I understand it, and I may be wrong, but Princeps at one time were hastaii and taraii were princeps... (pardon my spelling). Would it be possible to make a script that watched for a hastaii to gain 3 chevrons then convert them to princeps?

Or have it if I retrain a group of hastaii that had 3 chevrons, have them be disbanded and a group of princeps formed at no cost? Seems like an insteresting idea to me.