Received new baggage floors and access plates, but need to harvest all of the stiffeners from the olds floors. So got to drill out about 80 rivets.
Then carefully laid out the location for the new access panels knowing what I know now. Marked and drilled the corner holes. Called it a night.
10/26: cut the access holes. I really struggle with these. On the second one, I held the dremel well short of the line and then files to the line. Came out better. They'll both be covered with carpet so not too concerned.