Hi Bruce,
I don't know if the diagram in Alan's article was for 5.1 or 7.1, but here's Dolby's diagram for 7.1.
My first thought was that your rear surrounds aren't placed in the 135 to 150 degree arcs indicated by the diagram, BUT they are far enough behind the listening position that they very well might be. I can't tell, for sure, one way or the other. If you haven't got one handy you can
print a protractor, and use your eye, a laser pointer, or a laser level to get an idea of where your proposed rear surround positioning relates to Dolby's diagram.
I agree with Alan that you don't need to angle the QS8s toward your listening position, but can if experimentation indicates you should.
