Yes, I did this with both of my sons. It wasn’t a huge difference, but enough that it mattered (to us). This year I called the school my son ED to. Whoever answered the phone basically said no it wasn’t possible. I asked to speak to his financial aid counselor, had to make an appointment. He said yes it was possible, but I needed to send an email. I asked him what needed to be in the email and he was very clear about.