I totally agree with the Radd Concept ....
It really works. For me I was in my garage during high wind conditions and shut the door ...
Drew a 300mm square with heavy chalk. on the floor....
and repeated Radds methods .... over and over and over again .... and then some more.
in Less than 3 hours..... I was hovering and staying within a 600 mm radius of the square for many .... many minutes at a time .... lost and lots of practice and concentration was needed. and when I went out of my mental square, I landed and set up again and again until I trained my mind to focus.
The reward (and smile that comes from ear to ear thinking about it....)
Is well worth the pain and suffering of many crashes and spare parts I have had to replace over the year I have been flying Heli.... was getting nowhere fast....
but now I have the control and feel for my magic flying machine!!