Thank you for this follow up. I'm sure it's going to be of great help for some owners.
I couldn't help thinking... What a great room this would be for a nice set of Heresy speakers! Move your ficus to another room and put the Heresies in each corner. 😉
And the placebo test is an attempt to let a limited population determine, once and for all, using proper statistics, if there is any real difference in outcome. That spares the rest of us from wasting time and money on something that has no measurable benefit. Blind testing in stereo is an attempt to do the same.