[Jaydee]

The main cause for breakdown in the leads is near the end. Especially if you make your own. What I do is insert about 3/4 inch 1 mm steel wire into the carbon centre of the lead. This then picks up the high voltage spark further up the lead. Because If the spark jumps to the connecter at the end, it actually tracks some of the carbon with it, eventually having to jump a larger gap.
Also I love the accel yellow big coil. [cant remember the name] They are extremely efficient.
JD