I recently purchased the 80# broadcast spreader. I assembled it correctly (I believe) but I'm having a minor problem. When the spreader is set to the full on position (#30) the impeller hits the threaded end of the control rod. The control rod has a slight downward bend about 1/3 of the way down from the on/off lever. I contacted Lesco and was informed that the control rod should be straight, not bent. I was shipped a new control rod (part # 706035) but it too is bent. Do I have the correct part and have just improperly installed it or should the control rod be straight?