Loads more info required, schedule,operation (pax,cargo,long or short haul) Line ,base or both,classic (add more) 400 .Simply put "nil defects "T/R 1 competent chap.When it gets interesting at least 1 guy who knows what he is doing(and this can be time/cost saving) and up to 3or4 pairs of hands.The Queen can very quickly swallow labour!!!