regarding setting flaps while on ground...I mentioned doing it with a mechanic doing a visual check.
our airline does extend takeoff flaps/slats as the plane first moves forward under its own power...why? one reason is to stop the takeoff configuration warning from blowing while the power is advanced. the other is to protect the engines from FOD while taxiing.
I just wanted to add the component of having a human being looking at the flaps/slats and signaling OK.
even if the takeoff warning system was removed fromt the airplane, it is up to the pilots to make sure the slats/flaps are extended for takeoff.
Because this plane is so quiet in the cockpit, one can hear the slats popping into position, a pleaseant sound I assure you. One could also open the DV window and look back at the wing to make sure...plus the cockpit light for slats and gauges for flap position.