One way to fill the holes that are off is to use some thin doweling that's about the same diameter as the hole, cut the dowel material a bit longer than the scratchplate screws and sharpen one end of the piece of doweling to a point, then put a little bit of PVA wood glue on it, then gently hammer it into the hole, then use a sharp stanley knife blade to trim it off flush with the body of the guitar, hope that helps.