[Overkill]

Not trying to get off topic here, but I was having a problem with the new Diamond brand files I purchased locally. I discovered that when I put a flat edge across the file, it was cupped (concave) in the the middle. I took my straight edge to Ace Hardware, and all the files had the same issue.

I was speaking to Boggs Tools about sharpening some of my vixen files and mentioned my issue. He said it wasn't uncommon with todays files.