what helped me was to first get my split leg kong down so that i didnt have to think about it. then you do a short quick run up, making sure u have ur steps right. You dont really need that much speed but it does help. Then slap down hard with ur hands when u hit the ledge. bring ur legs through like normal pushing them to your chest, but then you have to have the courage to bring them all the way through and stick them out in front of you like a normal precision, leaning back. It also helped me to land with one foot first on the ledge, with the other on the side of the wall. Then I progressed to both feet landing after i felt comfortable with that.