Wow, getting ballast put in the back. That may help.
I non-reved to CVG on one of our 50's a couple weeks ago and I was in row 8 squeezed next to another big guy. Half way through the flight I went to use the lav and realized row 13 was wide open. So I quickly grabbed my stuff and went back there. The male FA saw me and made me move back to row 8 because I couldn't sit back there. I asked him why and he said for weight and balance. Huh?? I wanted to tell him that it was probably better if I sat back there and me being in row 8 means I'm in the same section. Of course I'm just a furloughed guy and he didn't know that. So I couldn't really argue.