to answer your post 152 - I've got no idea what height and I honestly don't care. The flaps can travel because the speed is correct. They don't care what height the aircraft is at and until I see a regulation which means I can't do what the AFM says I think its a good idea to do what the AFM says.
This isnt about one type - its a problem which affects different aircraft in different ways. It was more difficult on the CJ2+ which tended to be right up against the high end of the speed range for the take off flap. Its why I ended up taking off flapless under almost all conditions.
I had a load of pilots tell me I was wrong for doing that too..