It seems that I am constantly running into holes that don't quite line up, and need to be elongated. I've used rat tail files, shaft mounted stones, and drill bits to get this done. I suppose that the file is the only one of these methods that's actually correct. Stones get eaten up real fast, and drill bits were never designed for that. So, I've wondered about trying to use an end mill mounted in a hand drill. I've tried rasps in a drill, but they aren't real easy to use. So, I'm hoping that you guys can educate me on the best tool for this purpose.
