How to write a short story in a week, Day 4

Well, I finished the brainstorm draft. I saw one ending to the story, but I didn't write it down in any detail because at this point I'm pretty sure I don't want to use it. If this was going to get to novella length, then I would probably use it, but I feel the ending, as I envision it, lacks punch.
So today is the first wave of sculpting. I'll have to do a good job and take my time because I want to get it to my first reader tonight, but that only gives me two hours. It will probably happen tomorrow. So give your first draft to a reader, someone you trust, but don't tell them anything about the story until you get their gut reaction. It helps if you can train them to give you an honest gut reaction. Then explain what you want to do with the story, and if you're really lucky, they'll have suggestions on how to get there.