I have the JD jet kit with the recommended jets and needle for 3000 to 6000 feet. Has anyone tried changing the leak jet and what direction did you go ? I'm starting to get traces of soot from being a little rich at the end of the muffler. Not sure yet if I'm going to drop the needle a notch or 2 or drop a size in the main jet. It's been a long time since I have played with jetting and that was on 2t's. Even at sea level it feels a bit lazy and it should be running leaner as opposed to elevation it's jetted for. Need some guidance here , Thanks.