Hornbeam broom form

This is a European hornbeam, Carpinus betulus, collected in Germany in 1990, 50 cm high, around 30 years old, training pot, China.
Lena has cleanded and cut this tree which is, or was for sale. I took a long look at it and decided to play with it. How about a decent informal broom form? Is it not a broom form already. Yes sure, but it can definitely be improved.
So what exactly would this be? Well, see the last virtual to get an idea.