I'll ask the dumb question.....
All this talk about setting up Auto Nr for your area of operations DA confuses me.
All the Auto Nr charts and Maintenance Manual references dont mention anything about it.....
The charts take into account the altitude and temp at which a Auto check is taken and if you adjust the Nr to appropriately then it is my understanding that the Nr will remain within limits, no matter what altitude you find yourself. Take note of an Auto RPM chart next time you get chance.
Is the setting a high Nr a misnomer as well? High Nr = High ROD, so yes we can arrest the Nr with collective on the way down but as has been mentioned unless you lower the collective (and probably have it overspeed) before flare, level and cushion, the amount of collective remaining is reduced.
Personally I prefer Nr to be set as per the MM and auto chart. Crazy talk I know....