Brilliant at small engine, farm machinery and milking machine diagnostics and repairs. But treated his own gear like Poo, especially his car!
Yep, my mate doesn't take care of his cars at all but has managed to do some major repairs when needed just to get it back on the road. Changes from reverse to drive and vice versa while still rolling, stuff like that.
Used to also top up his oil with discarded engine oil from the local garage, rather than use fresh oil. Doesn't do that now, thank goodness.