It's incredible what these old girls had to put up with after they did their service time, one I saw had a cable operated back hoe on it,I talked to the old guy and he told me he put the water line in to an airport that was on top of a mesa, he hooked the front of the half-track to a D-8 cat on top of the hill and lowered himself over the edge, a rough rocky slope of at least 45 degrees, those old guys had huge ones!