What's the name and number for the parts that are needed for the idle adjustment? The metal piece that the idle screw hits inside broke within the first year that I had the saw and I have had no luck getting it from the warranty people. I'm ready to buy if I can find it. I likely may need to replace the spring in this area and know I need a new screw for adjusting since it was lost during various attempts to solve the problem as well as advise on putting it together and then adjusting.