212's are a hoot to autorotate to the ground.....just a two throttled Huey! Never done a 412 though.....
Being an ex-US Army Vietnam era pilot....I was fortunate enough to have been allowed to do thousands of the things....practice does make perfect.
The real key is the cost of insurance....and replacing broken bits if you do goof.....and with low inertia rotor systems....goofs happen quick and easy... not so with high inertia rotor systems. (the presence of inertia in the rotor system mitigates uh-oh's)