I'll take the blame for mentioning the runtz thing. Honestly I brought it up because anytime somebody says they're interested in going from 12 volts to 6 volts, the runtz gets suggested and then a lot of people seem to step up and encourage the idea. In simple terms it isn't what I'd say is the best option. The failure rate for a product like that should be 1 in maybe 100,000 or 1 in 1,000,000...and it seems to me it is much greater.
What impresses me is simplicity, durability and as close as possible...a zero failure ratio. Same reason I would never suggest anybody purchase the Pertronix. Have you noticed? With the Pertronix failure is expected almost as much as if you had Charlie Manson pack your parachute.
When I get home, I'll study this and see if I can come up with another answer.
