Larry, your pics are great. Glad I could help too. Yes, the rake angled does wonders. It does a great job of sifting out soil and moving rocks, reluctantly, to the side. I have found that going in reverse, with the rake angled also works, even without turning the rake around. Mine does not turn around. As you rake a trail, for instance, lets say its ten feet wide, the first few passes everything flows toward the side pretty well, but then the material builds up and the action becomes sluggish. At this point, angle the rake the other way (do not turn it around though), and back up. It will not sort dirt out in this mode, but the big windrow you made sure moves to the side nicely. When you get to the side of the trail, you can now also offset the rake, and keep moving the rocks off the trail, even while keeping your tire away from the edge of the trail, for safety.
If you don't angle the rake, you are gathering stuff till you have to dump it in a big pile. If you are angling, you are sorting, grading the materials off to the desired side of the trail/road, removing large rocks and leaving inch-minus.