The Zeal in its current state was not a particularly crucial or important mech.
Ves could have decided to update the Zeal to Mark III specifications with only minor cosmetic changes in order to distinguish the living mech from his standard counterparts.
However, it was not in his nature to slack off and take it easy. The moment a work assignment turned into a routine was the moment that Ves would begin to lose his touch as a mech designer!
Every serious attempt at fabricating or upgrading a mech compelled him to do better. There were many ways in which he could improve his work and increase the quality of the final result.
This time, Ves decided to take advantage of this occasion to conduct a radical experiment and see whether he could gain proof of one of his recent theories!