I removed the baggage door and marked the left edge with a straight line about 1/16" from the edge. This was my target trim line. I used a Vixen file, followed by a long sanding board, and then several grades of sandpaper and finally an edge scraper, to finish off the edge. The door now fits really nice on the left side. The right side is next. It's slightly more uneven than the left, with a wider gap at the bottom, tapering up to almost no gap near the hinge. I think this happened because of a slight twist in the firewall that actually pulled the top skin away. I've been aware of this issue for a while, and in the next work session I'll starting fixing it.