1978 I'm trying to figure out how to do inverts, based solely on reading Skateboarder Magazine.
I decided that my quarter pipe needed more vert. So, I added it. And covered it with paneling. Which lasted longer than Masonite. Interesting, this trick is now called a lean air, I called it an underhand air. At the time, I sent Skateboarder Mag. a whole sequencial shot of me doing a frontside lean air. I had hopes that they might publish maybe one of the photos. But, to no avail. However, I did start to see pictures in the mag of pros doing lean airs well after I had sent my photos in.