Talk:Mark 51-84/@comment-46590529-20200811014943

Honestly, with nanotech, Tony doesn't have to fabricate distinct suits anymore. Upgrades were probably more along the lines of programmed orders to clusters of nanites to take up new configurations.

"Nano-cluster 41b, form alieiron configuration X. Cluster 6J, streamline power couplings to increase efficiency by 2%. Cluster 24c, use heat sink design 3.0 to mimize run-off from Primary Arc Reactor, etc."

Basically, I'm thinking the Mark 51-84 were more akin to firmware upgrades, where Tony tested out different flight profiles, weapons configurations and software tune-ups.