My grandpa had one of those ferguson 20 tractors, he was "kind of" accident prone, had many mis-adventures with it, including running himself over with it, and a flash fire once when refueling it. Unfortunately, an uncle snagged it, as well as the Allis-Chalmers G when Grandpa died, don't know if he's ever done anything with either, but I think the Ferguson was still running when he got it. I drove the Allis more, had my own share of misadventures with it.