My neighbor was about to cut down this oak (not sure the species) and I couldn’t bear to watch so I convinced him to let me dig it out. Pot is about 24” and trunk is 5” at the base. It was about 12’ when I cut it down (6’ now) in April ‘22 and I was able to leave the one branch which had no leaves when I got home. Bottom line is that everything there is from last summer and the roots are growing through the bottom of the pot. Surprisingly healthy. Looking for a strategy this spring. Cut back the top and try to do better training? Do a big chop above the small branch lower down? Wait to see if there is any more budding on the trunk? Happy to hear any ideas.