LearnDash scoring modification

I have a LearnDash site where you can automatically score essay questions (they're graded by the fact that they're done at all), but I'd like to make it so that the automatic scoring only gives them a passing grade on the essay if it meets a certain word or character count. It would probably be pretty easy once you found the appropriate file.

If this is something you can handle, please use only my first name "Tim" in your bid so that I know you read this.