I think I found Leon's nephew.
This young whippersnapper shows us how to make a self indexing shelf pin jig using a variety of Festool tools. From his apron to his clamps to his hand tools to his work bench and power tools, it's almost all Festool.
I think the only thing that isn't Festool is the Dewalt router he uses with the jig. Leon will have to explain that one to us.
Heck, he even offers a SketchUp drawing of the jig.
Leon, do you know this kid?