I feel bad criticizing these works because I wouldn't be able to do them, and besides, they are offered altruistically so that we can enjoy them... but I will make a couple of comments.
If the appearance of the track were retouched a bit (aged tarmac, skids marks, and especially the curbs -with too basic look-, that need more "volume"...) it would be even better. And if the appearance of the buildings were also improved, it would be among top mods. On the other hand, the circuit is very entertaining, with those tight corners and the chicane in the middle of the straight.
Thanks for your great work.
I don't know, I am not the original author.