I got to use the motor move r(Quattro), on our 3 yr old Lunar Venus for the first time today, when maneuvering on stone (first mistake) / grass. What a great bit of kit. Even though this is a lightweight (904 kg) caravan, it must take some serious effort from the motors / mech to make it all happen. Question is......how reliable / long lasting are motor movers in general? I have lubricated all the mechanical parts as they get a hammering from road gunge etc. Mine has a 5 year warranty, and the "blurb" on it sounds good. But in the real world.....................?