Hi Whirly
I'm continuously amazed at your enthusiasm for spending money on helicopter flying when you have a perfectly good career!!!!
After 41 years it's still surprising how much I don't know and haven't for one reason or another not learnt. I think these days I'm forgetting faster than learning!!
However here's one tip for when you start teaching your new students autos to the ground. A very light weight friend, about 120 lbs, had a very large student, about 225 lbs, and extremely strong. On every auto in a Sikorsky 55, the student pulled the collective up too soon and the instructor did not have the strength to overide him. Finally he slackened off his seat belt and sat on the collective. Despite giving a verbal brief on the way down, the student still had the strength to lift the collective and nearly put the instructor through the top window!
Moral of the story------watch out for big strong students!!!
