Yeah, I also need to fix the angle of the launch, and shorten it a bit. That's pretty much all I can see that needs fixing, but I'm so surprised of how close it is
EDIT:
The above overlay was in fact off, I believe I have the portion of track spot-on now. Testers if you want me to send you this, just let me know.
You can see some offride footage in this video:
[youtube]http://www.youtube.com/watch?v=A4_ztpaEq4g[/youtube]