Remember also that if you had an autopilot installed (if you are using the brain to control a drone like the rover or copter) you'll have to reinstall it after reinstalling the SO.
You'd also need to parametrize it (second part of the comment). The needed parameters differ between the different vehicles, meaning the parameters for a rover are different from the copter ones. The linked comment is for the copter.
Ask away if you have any doubts or need any help.