Well, initially was brought on in the needs for a 'spring clean' around the back of the speakers/stands, and also the 'BackWall' thread of a few days back where folk were discussing room proportions, nulls and optimal seating positions. Given that I have good room dims and an excellent seating position, thought I'd give the speaker placement a tweak.
What's improved; bass response, soundstage and 3D'ness. Funny how moving speakers further away from the rear wall has created more bass, something I wasn't expecting.