Shining Rust

(Sequel to "My Best Employee.") Young aspiring inventor, Rodney Copperbottom, goes to Robot City in hopes of achieving his dreams and helping his father out. However, it turns out that Bigweld's been deposed of and that a new bot, Phineas T. Ratchet, has taken charge. But it turns out, there's even more that's going on underneath the surface... (AU; Rodney/Piper, Ratchet/Cappy.)