I just happened to stumble upon this Febuary 1969 issue of Popular Science, scanned into Google Books. Great article and pictures starting on page 131...
ps Google's scanning quality is sub par in my opinion compared to the way I do things lol, but it still is fun non the less!

ps Google's scanning quality is sub par in my opinion compared to the way I do things lol, but it still is fun non the less!
Popular Science
Popular Science gives our readers the information and tools to improve their technology and their world. The core belief that Popular Science and our readers share: The future is going to be better, and science and technology are the driving forces that will help make it better.
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