I've gone through Echo and now Husqvarna ext. Hedge trimmers, they don't hold up. Either the housing cracks, or the bearings inside the housing give out. Does anyone know if the same company supplies all the heads for all the brands, cause i can't get one to hold up. My dealer repaired the Husky a minimum of 4 times, and i don't want to deal with it anymore. What's the best out there ?