I know of one that had the bolts on one of the wear elements on the infeed auger come out. The wear element cut a 2" long hole in the side of the machine right there then went out the back without even a dent in the rotor.
We have a CR with the standard chopper. It has just the rubber coated roller on it and in the green we kept bridging over top of it and plugging the back end up. Not exactly the way to make big square bales (New holland doesn't offer a knotter option!). There is only about 10 or 14 inches for the material between the roller and the back chopper wall.
So I took the hole saw and cut a new hole for the roller about 4 inches further forward. Combined a lot of the green nasties after than and not an issue.