Wow, I love the stand. The gold leaf is a really nice touch.
I collected an american hornbeam, Carpinus caroliniana back in 2017, and have not done much with it yet. I would think you could get fine branching, fine ramification from the American species as easily as any of the EU members get with the European hornbeam, Carpinus betulus. The branching might not be quite as fine as Korean hornbeam, Carpinus coreana, but should be "good enough" for your current forest.
I searched for Carpinus caroliniana - and only got 2 hits. I searched for "hornbeam" and got 5 pages worth. Reading through, maybe 25% of them are American hornbeam, Carpinus caroliniana. So by using the botanical name, you miss many of the posts. But just using hornbeam, you got to read a bit to figure out which species they are talking about. Korean hornbeams are much more popular by counting posts.
I like the C. caroliniana, American hornbeam, because for me it is a much easier to work with "stand in" for American beech. I love the smooth bark of the trunk.
I love what you have done with your forest, I see nothing I would change. Well done.