I'm really sorry! I have a tendency to post and then repeatedly forget that I'm suppose to follow up!
Anyway, here's a picture showing the cut I made and how I bent the inside flap in. The cut was necessary to allow the flap to bend in at the top. I just took a grinder with a flap disk and ground down the sharp corner above the cut and then sprayed some paint on the inside there. So far seems to have done the trick.
