If you go back 35 years their was a kid in San Jose named Rick Walters who designed a few gliders including the White Trash... Plans were published in Model Builder. But not the Secret airfoil....
Rick was the Very First to hand launch that I know of even before Dave Thornberg.... Use to piss us all off that he could hand launch into a thermal every time.... Just think of that Joe guy, but 30 years ago :-)))) Craig.. Still have my White Trash :-)