So it seems I have the exact opposite problem as most people ive seen online. my reese hitch is rusted. the ball mount is not stuck in, rather it can't be put in. The rusting caused the side walls to swell some. Ive been trying to chip away at the rust with a chisel but it is hard to get down inside the mount hole. Any advice? I took it off the truck so I can work on it better. I'm going to sandblast it and repaint it after.