[Espeefan]

It figures that you would break a tap on the last couple holes, rather then the first few! If you can't get that tap out, just cut the material away from around the tap, and section it. You can always weld up the oversized hole, replace an entire section of metal, (like a small square) grind it flat, and drill a new hole. That's the beauty of metal working. If you take to much off, or drill to big of a hole, you can almost always fix it up again with a welder.