Well, ever since I heard that you need to protract your scapula in a planche, I've been doing it a lot. But I've noticed that a lot of other people who are capable of doing a full planche don't show nearly as much protraction as that I do in my planche leans.
Here is an example of a great gymnast performing the planche:
Here is my doing a planche lean:
Am I over-protracting?