So! I have been trying countless times to try and downgrade my rednand 11.0 to 2.1.0 and I just cannot get it to work. I have restored my emunand on OTP Helper so many dang times and launching Rednand on Luma3ds via homebrew then going to PlaiSysUpdater to downgrade it and I just keep getting the same error screen that tells you to power off your 3ds and stuff. I have a New 3ds xl and I don't have a backup of my rednand on an older version. Instead it told me to put the firmware from part 5 into my luma folder which I did. Now I don't know what to do at this point other than keep trying and it just keeps failing. I been doing this all day, literally ALL DAY. And Nothing from it. EDIT: I have been following plailect's guide also on part 4.