I recently purchased an F. W. Engels "President" razor from a great seller off the bay. The item was listed as having been taken through a 20k stone and stropped. When I got the razor it was in excellent condition but I did notice that the blade itself was not straight along the length of the cutting edge. It comes up slightly in the middle and dips down about .5" from the tip before coming back up. It's probably less then 1 mm in variation but I'm wondering if it is something I should even concern myself with. The razor seems to cut fine and I will shave with it soon. Any thoughts would be appreciated. Thank you.