Mann to the Core

Wheatley does a bit of a rough landing in 2Fort, providing some much-needed change in an eternal war between brothers. But can Wheatley -and the mercenaries- adapt to the changes, or will things take a turn for the worse? No humanisations. (The TF2-verse is AU in one vital aspect: Gray Mann never happened, which means that all connected events (such as MvM) haven't occured either)