Had a Bush Hog 2615, ran it for years.  A few slip clutches were the most problematic, wheel bushings in pivots never lasted and the paint sucked.  But,,,, never had to spend a lot of money on it.  Now have a Schulte, can't call the number but its the heavy model 15' and I've done twisted both drive lines to the wings.  First one we thought maybe the slip clutch was stuck, so son took all apart and polished them.  Second one happened later that day.  I like the walking wheels on the back of the Schulte.