Osterizer do you go to actual negative pitch or keep the idle-up in normal mode and pull the collective all the way down to the 0% stick setting?

Oster's right though practicing up in the air is a good way to go. These helis have alot of power for their size. This makes them more forgiving then their full-size counterparts. It also means they can power out of a bad auto (with enough altitude) plus their blades will never reach the critical coning angle.

When doing an Auto you'll want some forward airspeed this helps maintain the headspeed. As far as the collective settings they're going to vary. It's a compromise between maintaining headspeed and arresting descent. And as Oster said the flare is very critical. Flare to high and it falls out of the sky, Flare to low and your heli's subterranean. This is an advanced maneuver so if you could find an experienced local RC heli pilot or use a sim it would help alot.
Good Luck!