I use what grandpa called a swing hinge to steer leaners. When you use a tractor to guide you are exerting a lot of extra tension that doesnt necessarily work with the stresses in the tree. It takes some figuring but between notching and angled /multiple hinges you would be surprised how far you can get them to change direction. I be seen a couple how to videos on you tube that were similiar to the way I learned.