Not sure exactly where to post this, but...I'm 6'4", 189 lbs, so by no means am I overweight. However, because of my lovely quad belly, I have a difficult time finding shirts that fit properly. I've begun buying XXL, and even then, they can be snug around the mid-section. I was wondering (for button down shirts, as I tend to wear these to work), has anyone cut a slit up the back, that would then allow it to fit more loosely in the mid-section?