[mpgmike]

Originally Posted by Piotrsko

You could use a drill press if you can dimple the electrode to provide a start point for the drill or sharpen the angle of the point (difficult on a .060 drill bit). Dimpling without breaking the electrode is going to be tough.

Would be the same effect by increasing gap, system voltage and indexing the plugs

Here are some progression pics. I put feeler gauges between the electrodes to keep from damaging the outer electrode strap so I could dimple a mark. If you're better at this stuff than me, you may be able to do a better job. My eyesight isn't what it used to be.