I love that story! It's one of the few fan-fic's I'll re-read every once in a while. This is awesome, btw. I hope you feel like animating it someday. Even something as simple as having her blink innocently would increase the adores-level.
Good call! But it's actually based on a scene in chapter 18, where Vinyl asks Octavia if she got past the auditions or not. I liked the mental image I had of Octavia looking euphoric for a change, so I just whipped out an EqD-worthy image. You know how it is.