Ever think of why they haven't done it before? Thats 10-50 jobs at every airport in the world. Most major commuter aircraft already have reverse thrust deflectors. Big scoops that fold back over the exahst that enable the same thing for push back, so long as jet wash areas are clear. There are usually baggage handlers there.... They could automate that too, but they haven't.
Mark Heller "Well - I oughta....." -Jackie Gleason