Bill,
Don't fret too much. I'm sure Mr Pfrommer will make it like it was before. He will, however, have to pull the rib completely, in order to either replace it or straighten it out. Probably a good time to take a look between the barrels and see if all is well in there anyway. It'll give you peace of mind to know he's given the thumbs up on the barrel health after inspecting for rust in there.