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But I learned quickly that you can not depend on the dead centre in the tailstock quill to do the job for you. If you wind it in and tighten the jaws, I guarentee the jaws will draw the centre off somewhere.Winding the tip of the morse taper out a half turn is the way to go. You can clearly see what is going on as you tighten the opposing jaws.When you think you have the hole centred, then you can wind the centre in until it touches. It should not move at all. If it does, back off and make some more adjustments.I'm sure there are other ways of going about this, but this method works for me.