Don't do full down autos at all and save all of us ( owners ... Not pilots ..) a load of cash on our premiums !!!!!!...... Apart from ,admittedly , being fun they are totally unnecessary and have caused the writing off of 10x as many aircraft than have ever been trashed by genuine engine failures . Instructors seem to be mesmerised by practicing something that ( from 2ft up .... ie you practice power recovery after the flare ) is v v unlikely to kill or even hurt you . If you can get the machine to 2-3ft and near zero ground speed then forget the rest !!!
I certainly now would never allow autos to the ground in any of my machines and will expect my insurance co to take that into account .
Ps. If you can cock it up in a 206 god knows how you would have ended up in something more tricky ......