Make sure you install this version of moonshell 2.09 before using MAIO: http://www.mediafire.com/download/im4t4x5fta8odeo/MAIO+Multi+Flashcart+Update+9.XX.rar
Only Xbox I don't have is the OG, and One X model specifically, I regret giving my chipped OG model to one of my kids years ago, after later hearing he sold it to pawn shop, damn kids!