What about something like this? Use a large flate grow box to increase the root flare along with thread grafts. Then shortening the top and grafting branches lower or waiting for a bud to form there and working a canopy like this?
just messing with he overall image. I know Bjorn wouldn't like the tree so tall and would say it's a classical mistake. It was just a quick vert. so you may want the tree to go left and not right so much.