I am currently on the eighth version of the screenplay. I started this script May 2011. I have heard that most writers dread the rewrite. Sure, there is the initial sting that you thought it was done, but I actually enjoy the process of rewriting. Each version of the script gets better and better. It is also amazing to see the transformation of the story from the original to now.
When do the rewrites stop? When I stop receiving notes from my small group of readers that I agree with and think would make the story stronger.