Tried CodeRush's way with "flashprp" in FTK to remove 2.1. All the FTK commands returned "Error 201: fpt.exe cannot run on current platform". Neither backing up nor flashing with FTK worked. Maybe the board is too new with protections not supported by current tools. AMI Tool says "incorrect size" when loading bios. Flashing of bios modded with Dell 2.2 by Phoenix in Asus EZ Flash returns "security failed". Oh well.