No problem with your comments but I don't find instruments fading as a problem. IMO I enjoy BBB with the channels reversed and that is it. I do have easy access to my rear speakers and sometime this week, since the wife is out of town, will do your easy experiment to check out the sonics.
Got it, I just thought you had misunderstood and thought that the APO reverses channels... All on the same page now, I believe!