Bryan - perhaps it is you who is wound too tight
I didn't say the MR and TR were not propellers in the strict definition of one - just that nobody in the rotary world calls them that.
Talking about propellers when you mean rotors is surely a quick way to confuse newbies.
I've only been teaching helicopter stuff for 31 years so I probably don't have a clue.......................................
CFSH has quite a good reputation worldwide but its easy to knock if you haven't experienced it.