Ah, the joys and pains of setting up stats.
It never ceases to amaze me how incremental changes in the positioning of my Acoustats can make them sound so different.
I guess I am an audiophile, because I have always preferred to raise the back of my speaker so that there is less of a slant.
I've gone back and forth,part of me says the back slope(,the way they were intended to be used )may help with taming the treble,or something like that is stated in the manual.
So now, after reading this, I will raise the rear of the speaker.
Then after awhile I'll forget what it was like in the stock position,so I'll switch again.
It's still cheaper than buying new gear when you feel like you need a change.