Drove the National Circuit and it's kind of a great work in progress. It features an awesome layout, but the lack of scenery and kerbs leave the track feeling a little blank/poor.
It's a great circuit, though. Congrats on that second to last corner, very tricky and incredibly fun.
Good job, Obelisk
Regarding the kerbing - I overwrote the National Circuit by accident. If I can recover it, and the Sprint circuit, I'll definitely update all three with kerbs.