Another idea I want to expose to public scrutiny: I'm building a coil for my school's theater, and I want to be sure that there's no chance of someone getting hit by a streamer at the same time as an arc hits the primary. My idea is: cover the primary in aluminum (not touching it-just to stop all arcs). Do you think it would work? -- --Doug Brunner <dabrunner-at-earthlink-dot-net>