Not sure what point you were trying to make with Gazelle being "easiest to fly on the register"? Any aircraft can kill you. Any aircraft can autorotate if mishandled. I know from my military flying, what a "challenging" aircraft is. In a nutshell, it would be nice if this general rule was a bit more specific, like depending evaluation by your instructor, you may need UP to 5 hours conversion training, not you MUST do 5 hours. I would rather do 2.5 hours dual, then be assessed good to go, have my CPL validated, rather than 1 hr dual and then have to go boring holes in the sky solo, for another 4.