You have done some nice work with several maples, as you have shown in other threads. Thank you, very inspirational. I enjoying seeing you develop these maples.
I like where this tree is headed. Based on the second to last image from your 3/11 post, (tree in silhouette) against the greenhouse, I see a central leader, and two large branches, the lowest arising from the left, second arising from the right. From the soil line, to the central leader, you have developed nice turns and taper in the trunk. Would you consider using the first smaller branch headed to the left as your new leader? In your 12/23 post, you suggested taking off this leader in the future. If you wish to continue building trunk girth, you could keep on the largest lower branch?