I have a photocopy of that article, from The Rifleman written in 1977 by Roger Barlow. I have tried to put a photo from the article up, but, the photocopy is too poor to get a good picture of.
The Levi 4 shot sliding breech gun appears pregnant, in the same way a small bore Parker does. You nailed it, take the virtues out, light, quick handling, well balanced, and make it something else.

Best,
Ted