QS down is easy, you just have to cut the injection for a few milliseconds when you receive the signal from the sensor...but a QS UP...is more complex. You have to accelerate the engine to match the rpm with the speed and that is not so easy . If you do it inside the ecu software, it means “modifying the program”…..if you do it outside the ecu, when the engine accelerates through the QS, the ecu will take it as a critical error….Hi all a bit late on this post, I'm just in talks about having a shifter on my 2018 with a map, he says it can be up and down, does anyone know anyone on here who can complete such a task? Many thanks