Wow! I had not seen that post of yours (and I thought I was writing long posts!). Amazing cabinet and quite a lot of impressive things you built (the QS8 back plates are stunning).
But, when I see your room, it does seem like you might be having bass issues in there. How did you solve them (if you actually noticed them, of course)!
Where do all the loudness buttons go? They just die... There is no such thing as silicon heaven... not even as implants.