I have decided to try official nougat on my Moto G4 Plus. I am currently on custom Rom MM but when got the phone I installed TWRP and Super su and made a backup using twrp and full flashfire backup. If I install Nougat after going back to stock can I downgrade to MM when I want and maybe using the flashfire backup? Will I be able to relock the bootloader after going to nougat?