I know about switching back to stock but that's not what I am asking. If the car is tuned at a pro shop do they give you the pro-tune maps to take with you so you can go back to the pro-tune after a BMW dealer visit?
I am pretty sure on the Vishnu flash you have to ship the ECU back & forth to get it changed.
2013 135is Cab JB4/ISO - 2011 335is JB4/ISO/BMS Flash - 2009 V-Star
2009 Ford Expedition EL 4X4 - 2003 Xterra 4X4 - 1998 Ranger 4X4 - FFR Cobra MK-IV work in progress