Has anyone other than us had problems with valves dropping out of these blowers. We have dropped 2 in the last year and both were just out of warranty (few months). My dealer would be happy to install valve kit for $376.00. I can by a new one for $495.00 and have one years warranty. Does anyone know if Stihl is aware of this and if so do they offer help with repairs? I have talked with other LCO'S in the area and they too are having the same trouble as us. Dealer also tells me that the 2 new 2008 model BR600's I just bought have been re-designed not too drop.......we'll see?