can you fix these dents by filing or something or does it have to be replaced?. as long as it fits in the seat it should be fine RUNS terrible then if I move it a fraction it starts to smooth out, turn it again and the whole engine shakes, there is only one area on this needle where it's runs half way decent , I've been told 1 1/2 or 2 turns open from the bottom , it will only run about 1/4 turn open , would 40:1 mixture be better then 50:1 and NO I'M not dumping 1 quart of oil to 6 gallons of gas 24:1