That's nice!
I saw a similar project other day on "Eisei-en Bonsai" channel!
Good luck on that project, now it's waiting time. xD
I know there is one where Bjorn created a clump planting of seedlings, which people pointed out to me when I showed one VERY similar to what I have done, fortunately well before he made that video.
Don't tell me he also did a forest like this. Do you have a link?
I do not mind the wait. My oldest seedling project is no 9 years going, root over rock windswept taxus. About 20 trees from seed in pots, and a few hundred in growing beds, across maybe 10 species all in. Bonsai is a long term hobby.