I have been racing almost exclusively on this track since I came back from my little vacations in May, and I already have more than 1400km on it. It's a real blast with the right cars. Some turns are really hard to master, like the very first one when you arrive at full speed, or the two slow ones right before the hairpin, both of them in a downhill. Of course, scenery is beautiful and detailed, it doesn't look rushed like other modded tracks. Excellent, truly worth of a perfect score. Can't wait to see what you have done with Charade.
The physical mesh for the cobblestone section only varies in height by a really small amount (+-30mm I think) so I am surprised that you are scraping the bottom of the car - can I ask which cars give you this problem? When I release v1.1 the cobblestone section will have a much smaller step up from the tarmac but I am happy to test it out with a car of your choice first.