Thanks for the input, I really appreciate it.
I meant growing seasons, going on their fourth so they are three years old. I grew them from seedlings I collected from a friend's tree and they were grown in an Anderson flat. There was 50 to begin with, 25 in each flat. They were mostly over two feet tall and last year I docked them all to the cuts you can see and the whips are what grew out last year.
As they grow out together I will prune to suit the position. I tried to plant by trunks size rather than height.
This is only an initial planting and I'll take a picture looking down from above so you can see the arrangement. I feel pretty good about the layout, but there's always room for improvement. Once the trees root in and start growing I'll do an initial trimming and styling to bring everything into perspective and then let it rip for a few growing seasons.