Gunger - CMR is enough at touchdown, less if pushed and conditions are IAW EU and company requirements. I would prefer to have 2-300kg more and normally do as I tend to make fuel.
Flyburg - yes, once on the ground CLEAR OF THE RUNWAY with less than 760kg in relevant tank..There is no rush, you will not explode! Remember the restriction is on ground operation of the pumps.
Re 'overhead', Gunger did amplify to say 1500' over field.