I use a foz as well. One point that has not been mentioned, and it is an important one, is to calibrate the Foz before each use. That is assuming that you are using it on occasion, and not every day
"Straight" talk
I can't emphasize enough about the importance of proper azimuth. When even a bit off, the result is smearing of soundstage, emphasis of one channel or the other, blurring of lyrics, loss or air around the instruments...etc. If Paul Simon (et al) doesn't sing in his own space exactly between your speakers....better get a Foz.