Surely, the time you have a problem with 160 to 4 is with a tailwind, not a headwind. On the little and big bus, neither have any problem with 160 to 4 unless you have about 10kts up the chuff, then the 330 will really struggle. In any case, with those conditions, I would want some energy in hand rather than slowing down too much. I would rather go round from a high energy problem than struggle with a negative shear close to the ground.