Morning prd, stability is always going to be an issue because of the environment rideons can be used in, no manufacturer has any control on that unless they fit a tilt switch so the mower stops if it gets to a certain degree angle.You then have an issue if the mower stops in that position, how do you get it out of that position. Getting off a machine in this position also has its share of dangers. I don't know, new ones may be fitted with something like that. This is where the Deutscher comes into its own with a low center of gravity and with the duel wheels, makes it wide and flat, except for some reason they stuck the seat up high. This can be overcome by fitting a seat directly to the frame. People will always push the limit on cutting sloping ground