I stopped reading about ddBR after this:
A prerequisite for use - availability on the console multi-boot. Activation multi-boot Activation multi-boot
To use the system ddBR on many other consoles, you need to replace the dtb.img file on the first partition (FAT) file from the corresponding model.
Thanks, I may try TWRP 3.0.2 for the Probox2 Air, but first let me clarify this:
TWRP is installed in the recovery partition. Is this the same partion where uboot is? Does this mean that the hardware buttons and the instructions to install e.g. Ubuntu will not work anymore?