well I know how long it takes me to learn a normal track, so I'd say it'll take a few laps (years) to learn the ring! it's all about entry,corner speed and exit... (planning) so if you don't have the clear picture in the head on the layout you wont get greater times, seeing that they're SO many corners and such a long track I think it would be pretty hard learning all the knicks and knacks, that would be say x4 times cornes that I'm used to, wouldnt mind the straights since they;re just a matter of flooring it Unless you get mad power and can make up for misstakes cornering....traffic would play a vital role too I guess. Crappy tyres and brakes would slow you down something massive.