Take a look at Gregory's use of the second feather board. If you look carefully at 4:55, it causes the cut to close up around the blade. The riving knife is there, but I have to wonder if it's a good idea to use the second feather board.
[video]https://youtu.be/spotCL6y_7c?t=4m49s[/video]
[video]https://youtu.be/spotCL6y_7c?t=4m49s[/video]