I see you can download update.zio or nandriod for 9.8 I have 9.0 installed. If I want the freshed best install of 9.8 what do i do? why does BD provide both nandroid and update? Also how are themes also "update.zip" Does this mean you have to format your device everytime you change a theme? and put it in the root SD card and update it from SPrecovery?