I got bored yesterday so I started making this for my own use, just enter the lap that the first pit fell on and then hit the black button. If you find it useful, let me know. If you can do the math in your head unlike myself I don't care.
http://img329.imageshack.us/my.php?image=estimator4ei.swf
and it's for flash 8, go get the latest version!
http://img329.imageshack.us/my.php?image=estimator4ei.swf
and it's for flash 8, go get the latest version!