If NG is above 90%, action is also required, as it will underspeed. The 407
has a higher rate of descent in autorotation and RRPM decays faster than
in a 206, so getting the collective down expeditously is even more
critical in the 407.
Flying it in MANUAL is picked up faster by pilots with time in non-
governored helicopters as you are controlling RRPM with throttle (didn't
find it much different than a 300C). You did only ask about Bell school, so
forgive the ramble. You will LOVE flying the 407 .