chrisN.
l`m surprised that nobody picked up on what you said, l suspect because of the reference to "mainly gliding".
We are talking about hand flying skills after all.
You will know of the K23 - for others, a first solo glider advertised as being unstallable - and the problems caused by pilots going on to fly "gliders" that could and would stall.
l don`t want to make a big thing of this but there is a connection.