Hi All, having bin there and dun that, I'd just like to endorse what Falcon 269 Mike says, (OK, I know he's done dozens more than I have, but as it can go wrong, it's worth endorsing) it's important to ensure that that taper tap is VERTICAL by the time it's two threads in. Find yourself a short straight edge, and make sure it is, it far lessens the chance of a broken tap.