also used 3Dsimed to play around with sum textures.
Its Bumpy , wide , break while turning track.
did have a go at converting the old rfactor version but kept getting weird result so had a go from scratch
35 pitboxes. AI not to bad
if u have a full grid, the 6 or 8 at the back dont get away very well , presume this is a assetto corsa thing an not a R.T.B issue