Still a long way to go. See how we "killed" it in August 2017 repotting it with cutting roots, shaking out substrate andin full leave without defoliation on during a heat wave in the middle of August. They told me that I am crazy. Fortunately the tree dos not know that this is a very bad time and everything I did is totally against conventional wisdom. Now the maple waits patiently until this method is in textbook as being very good for maples.