1) Flash with a fiasco.

2) Turn on the system

3) Add devil and testing repo and Install backupmenu.

4) Turn off the system and create a root image with backupmenu.

5) Turn on the device and copy the root image in your hard disk on you PC.

6) Turn off the device and put it in flasher mode pressing U and plugging the USB cable

7) Flash the "customized" root image created by backupmenu. Even if this is identical to the original (exept for backupmenu).

8) Turn on the system and go to the settings/informations.

In practice.. Every image created by backupmenu, even the simplier with no flashing of the kernel, doesn't show the informations about the version of the system ..
Because this informations seem to stay in another "place" ... not in the root.