I'll post a new version that should also have much more forgiving collisions, so you can all stop moaning!
lol, you do want folks to enjoy it don't you :)
I've tried the latest exe, there was no stuttering and the collisions against the sides of the track were MUCH better.
I did come across a strange bug though... I was driving down a long straight with a dip towards the end, as I started to go over the dip, the car got stuck in the side of the track. When I changed the camera view, the first cam (heli cam) showed only the cars shadow and the arrow towards the middle of the track but the car was nowhere near it. I wasn't that close the the edge of the track when this happened, it just suddenly jumped into the side and was higher up than the car could jump normally.
I wasn't able to reproduce it afterwards... weird.