Looking good. The chipped corners are to be expected. I was told by several smiths that you don't want crisp sharp corners anyway, because any slight misalignment of your workpiece would be stamped witha sharp line. And -surprise surprise- straight corners chip a lot harder than rounded corners

Like Mike said, if someone could look at it in person, that would be great. But from the pic I can't tell anything wrong with it. But even if it had a divot here and there, that wouldn't matter. You'll find a use for them, for example when straightening things out. You also don't want to grind down the face, because the face is relatively thin. Less than an inch. So if you grind away half an inch to make it perfectly flat, you might go through the hardened plate, or it might become so thin it starts denting under your hammer. Making the plate too thin would turn your nice Peter Wright into a 300 pound paperweight, doorstop or garden ornament.