Wish I had known about the sagging fuel tank issue before I closed the hood that first time. I now have that slight dent you described in the forward edge of the round cutout.
When the tech came out to install the sagging fuel tank fix on my 2720 he used a small hammer and a block of wood cushioned with a shop rag to completely remove the dent around my hood cutout. He didn't even scratch the paint and the dent is totally gone. So it can be fixed if you are careful and use the right tools.