On a completely different topic relating to the Cauldron-Born, I heard a theory once: it and the Kingfisher's names are backwards. Bear with me. The Cauldron-Born is supposed to be named for "unstoppable zombies of Irish* myth". Now, while its durability certainly compares favorably with its nearest rivals the Vulture and Loki and even equals the heavier Thor (while carrying more pod space than any of them!), it isn't exactly what we'd typically term a zombie, what with the XL engine and large amounts of ammo (albeit CASE-protected) in many configurations. The Kingfisher, OTOH, was essentially the archetypal Zombie Assault Omnimech, at least until the Jihad and coming of designs like the Archangel and Osteon. It's legendary among players for its unkillability, especially the flashbulb C. And the Kingfisher is anthropomorphic, which zombies usually are an RL kingfishers (a family of birds) definitely are not. The cauldron-born, OTOH, does have birdlike legs. So several years ago someone, on this or a previous iteration of the forums, suggested that somewhere along the way their names got switched. I don't know that there's any way of proving that, or how you'd go about digging up information on the production of the original TRO 3058, but it's an interesting idea nonetheless. Even if it turns out to be hogwash.
*Isn't it actually Welsh? I recall cauldron-born in the Chonicles of Prydain, which is adapted from Welsh myth, largely the Mabinogion.