I've got a sharpened and to sharpen stainless tray in my toolbox, have a sharpening session every so often. Drill sharpening is a dying art, they don't teach the apprentices it any more which is a shame.
On a slight tangent, how do folk go about getting rid of those ridges/burrs you can sometimes get on a shank from a crappy chuck, without knacking alignment up? My set of Presto's has some bits with that damage due to a crappy chuck I had a few years ago, and I keep meaning to get around to sorting them, but don't want to risk making them bin fodder in the process.