Got a reliable source that says its definitely something That has been presented to him and that communication is tough but because het is so busy and because Metallica is in there post production phase and touring that adding gear To there live show isn't feasible Late in the game Unless there is a massive change from the top down, plus they are saving 10k Net a show per guy using the axe Fx. However it may be added to the tuning room to "Tune" further He wont do anything thats not perfect. Keep in mind that Marshall and other brands (rumors are Krank, 5150, Diezel, Wizard, etc etc) in the past have tried and nothing has been done tons of companies have sent them Mods, Prototypes, etc So who knows