This app is absolutely great for fixing odd AI whether its the track border or ideal line. However, if I don't hold down the shift key every time I load a track, it does not incorporate the side line I created in the fast lane ai file. I originally just tried to re-create a fast lane with the original side line of the track, but after one recorded lap, the red side lines disappeared hence, the need to create the track borders. So it seems the new side lines are not truly incorporating into the fast lane file. It's not really that big of a deal but, when I play this track months down the road, I'll have a senior moment and be wondering why cars off the starting grid are using the pit lane exit, shooting cones into the air!