FWIW when you're thru tweeking with the RS meter just relax and listen for a few months. By then you will have the sound stage fully absorbed in your mind. Then revisit the positioning to tweek your sound stage even more. Move speakers about, no more than an inch or so at a time (after marking the original positions so you can move them back). Great set up usually takes a long time, much experimentation, and patience. Enjoy.