@clearthink
I think what @millercarbon meant was making sure the speakers are equidistant from the back- and sidewalls. That will have a big impact on room acoustics regardless of the exact listener position.
If you are going to do this for the purpose, goal, and objective of higher fidelity then you will also have to design, build, and install a clamping device to insure that your head never deviates from the optimum measured listening position.
I think what @millercarbon meant was making sure the speakers are equidistant from the back- and sidewalls. That will have a big impact on room acoustics regardless of the exact listener position.