I know this is a contraversial subject but I had the experience to do
a full down auto in the R22. Maybe I was lucky because I did not
damage the heli and did not even slide on. It was a bit of a rough
landing but otherwise ok. I have a total of apprixmately 300 hours
heli time. Enstrom, Mini 500, R22 etc.
I was never taught to do a full down but Rocky might add some comments
to what I want to say.
I think you should FLY THE HELI UNTILL YOU ARE ON THE GROUND
Just remember even with the low rotor rpm horn sounding you still have
control.
In the R22 you have still got control at 80% rotor rpm but I do not think it
can be
streched any further.

I might have been lucky with mine but it is a lot easier to just land the
heli than to
do a power recovery.

Regards

Hennie