After modding Mid-Field Raceway from scratch, I know what you've been through :D
It feels really nostalgic already, but there's still some work to do I guess. Some clipping models, crashing AI and a missing map, but nevertheless really fun already especially with retro GT500 cars! Keep up the good work.
All of the optimization are going to come before the final release of the track alongside the physical road mesh. I might be tweaking elevation and road here and there based on feedback received from the testers.