non iron, I don’t want to contradict you, but the extended leg was fitted for the US market, to enable the aircraft to be used on an airbridge, not to make the props further from the ground as you suggest.
The major problem with the ATP, was that little money was spent on development of the aircraft or tooling, which resulted in a lot of problems in the early days, from which it received its bad reputation – ATP Another technical problem or another thousand pounds