Ade,
Come back to it tomorrow and you will notice a little something extra. Over the next few runs you will notice a bit more each time.
The guy that I purchased the rear diffusor from is called Derek (or Cyba is his screen name). He is based in Taiwan, but the service I recieved from him was excellent. I think it cost me £120 delivered - not bad really. Derek's profile is here:
http://www.e90post.com/forums/member.php?u=26793
Cheers,
Ben
