I have seen tanks and other vehivcles take 20 and 30 percent grades with out rolling over and that includes wash outs. My bet is this damned thing is like the old M-158 that will roll over a sharp turn or 10 percent gade. Bad design ask him what the steepest slope is that he can traverse parallel to the clope My bet is not much. and if more die we need to ask the assholes what the rush is all about.
BT