I'm not normally a fan of vintage tracks as most of them seem to be conversions, but I thought I'd give this a try as Donington is my local track, you've put a lot of work into the mod and I was curious.
I have to say that I'm absolutely blown away! This is an absolutely beautiful mod, fun to drive and really well made.
The ONLY small issue I noticed was some flickering on the crowd at the start / finish line (on the left hand side) and also on the horizon during replay. However, neither are really noticeable unless you're looking for it and shouldn't distract from what is an otherwise amazing mod.
Highly recommended (and the only non-Kunos vintage track in my collection).